diff --git a/.gitignore b/.gitignore
index 6fd0a37..24b9585 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,41 +1,4 @@
-# Compiled Lua sources
-luac.out
 
-# luarocks build files
-*.src.rock
-*.zip
-*.tar.gz
-
-# Object files
-*.o
-*.os
-*.ko
-*.obj
-*.elf
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Libraries
-*.lib
-*.a
-*.la
-*.lo
-*.def
-*.exp
-
-# Shared objects (inc. Windows DLLs)
-*.dll
-*.so
-*.so.*
-*.dylib
-
-# Executables
-*.exe
-*.out
-*.app
-*.i*86
-*.x86_64
-*.hex
+lazy-lock.json
 
+.luarc.json
diff --git a/README.md b/README.md
index c4d9a26..59eebe2 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
-# config.nvim
\ No newline at end of file
+# config.nvim
+
+我的neovim配置
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..bb843dc
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,4 @@
+
+-- INFO: 加载启动配置
+require("boot")
+
diff --git a/lua/boot/cmds.lua b/lua/boot/cmds.lua
new file mode 100644
index 0000000..5cccac6
--- /dev/null
+++ b/lua/boot/cmds.lua
@@ -0,0 +1,10 @@
+
+-- ********** yank **********
+vim.api.nvim_create_autocmd({ "TextYankPost" }, {
+    pattern = { "*" },
+    callback = function()
+        vim.highlight.on_yank({
+            timeout = 300,
+        })
+    end,
+})
diff --git a/lua/boot/init.lua b/lua/boot/init.lua
new file mode 100644
index 0000000..580442c
--- /dev/null
+++ b/lua/boot/init.lua
@@ -0,0 +1,10 @@
+
+require("boot.opts")
+
+require("boot.cmds")
+
+require("boot.maps")
+
+require("boot.util")
+
+require("boot.plug")
diff --git a/lua/boot/maps.lua b/lua/boot/maps.lua
new file mode 100644
index 0000000..fae4680
--- /dev/null
+++ b/lua/boot/maps.lua
@@ -0,0 +1,8 @@
+local map = vim.api.nvim_set_keymap
+
+-- buffers
+map("n", "<C-H>", ":bp<esc>", { desc = "buffer prev" })
+map("n", "<C-L>", ":bn<esc>", { desc = "buffer next" })
+
+map("i", "<C-H>", "<esc>:bp<esc>", { desc = "buffer prev" })
+map("i", "<C-L>", "<esc>:bn<esc>", { desc = "buffer next" })
diff --git a/lua/boot/opts.lua b/lua/boot/opts.lua
new file mode 100644
index 0000000..c8a3e2e
--- /dev/null
+++ b/lua/boot/opts.lua
@@ -0,0 +1,67 @@
+
+-- ********** leader **********
+vim.g.mapleader = " "
+
+-- ********** line number **********
+vim.o.number = true
+vim.o.relativenumber = true
+
+-- ********** tab size **********
+vim.o.tabstop = 4
+vim.o.softtabstop = 4
+vim.o.shiftwidth = 4
+vim.o.expandtab = true
+
+-- ********** encoding **********
+vim.o.encoding = "utf-8"
+-- vim.o.termencoding = "utf-8"
+vim.o.fileencodings = "utf-8,gb2312,gbk,ucs-bom,cp936,latin-1"
+
+-- ********** backup **********
+vim.o.backup = false
+vim.o.writebackup = false
+vim.o.swapfile = false
+
+-- ********** search **********
+vim.o.hlsearch = true
+vim.o.ignorecase = true
+vim.o.incsearch = false
+
+-- ********** display **********
+-- blank chars
+vim.o.list = true
+vim.o.listchars = "space:·"
+-- syntax
+vim.o.syntax = "on"
+vim.o.termguicolors = true
+vim.o.cursorline = true
+-- wrap
+vim.o.wrap = false
+-- fold
+vim.o.foldenable = true
+vim.o.foldcolumn = "1"
+vim.o.foldlevel = 99
+vim.o.foldmethod = "manual"
+-- vim.o.foldmethod = "indent"
+
+-- ********** clipboard **********
+vim.o.clipboard = "unnamedplus"
+
+-- ********** mouse **********
+vim.o.mouse = "a"
+
+-- ********** gui **********
+if vim.fn.has("gui_running") then
+    vim.o.guifont = "FiraCode Nerd Font:h11"
+
+    if vim.fn.exists("g:neovide") then
+        -- Floating Shadow
+        vim.g.neovide_floating_shadow = true
+        vim.g.neovide_floating_z_height = 10
+        vim.g.neovide_light_angle_degrees = 45
+        vim.g.neovide_light_radius = 5
+        -- Transparency
+        vim.g.neovide_transparency = 0.8
+    end
+end
+
diff --git a/lua/boot/plug.lua b/lua/boot/plug.lua
new file mode 100644
index 0000000..cb21809
--- /dev/null
+++ b/lua/boot/plug.lua
@@ -0,0 +1,15 @@
+if vim.fn.executable("git") == 1 then
+    if vim.fn.isdirectory(vim.fn.stdpath("data") .. "/lazy/lazy.nvim") == 0 then
+        vim.fn.system({
+            "git",
+            "clone",
+            "--filter=blob:none",
+            "https://github.com/folke/lazy.nvim.git",
+            "--branch=stable",
+            vim.fn.stdpath("data") .. "/lazy/lazy.nvim",
+        })
+    end
+    vim.opt.rtp:prepend(vim.fn.stdpath("data") .. "/lazy/lazy.nvim")
+
+    require("lazy").setup({ { import = "plug" } })
+end
diff --git a/lua/boot/util.lua b/lua/boot/util.lua
new file mode 100644
index 0000000..c2a929b
--- /dev/null
+++ b/lua/boot/util.lua
@@ -0,0 +1,20 @@
+local M = {
+    uv = vim.uv or vim.loop,
+
+    has = function(what)
+        return vim.fn.has(what) == 1
+    end,
+
+    executable = function(what)
+        return vim.fn.executable(what) == 1
+    end,
+}
+
+setmetatable(M, {
+    ---@param key string
+    __index = function(_, key)
+        return require("util." .. key)
+    end,
+})
+
+_G.NeoVim = M
diff --git a/lua/plug/ext_git.lua b/lua/plug/ext_git.lua
new file mode 100644
index 0000000..5035775
--- /dev/null
+++ b/lua/plug/ext_git.lua
@@ -0,0 +1,19 @@
+return {
+    {
+        "lewis6991/gitsigns.nvim",
+        event = "VeryLazy",
+        opts = {
+            current_line_blame = true,
+            current_line_blame_opts = {
+                virt_text = true,
+                virt_text_pos = "right_align",
+                delay = 1000,
+                ignore_whitespace = false,
+            },
+        },
+        config = function(_, opts)
+            require("gitsigns").setup(opts)
+        end,
+    },
+}
+
diff --git a/lua/plug/ext_symbol-usage.lua b/lua/plug/ext_symbol-usage.lua
new file mode 100644
index 0000000..09e63c7
--- /dev/null
+++ b/lua/plug/ext_symbol-usage.lua
@@ -0,0 +1,78 @@
+return {
+    {
+        "Wansmer/symbol-usage.nvim",
+        event = "BufReadPre",
+        config = function()
+            local function h(name)
+                return vim.api.nvim_get_hl(0, { name = name })
+            end
+
+            -- hl-groups can have any name
+            vim.api.nvim_set_hl(0, "SymbolUsageRounding", { fg = h("CursorLine").bg, italic = true })
+            vim.api.nvim_set_hl(
+            0,
+            "SymbolUsageContent",
+            { bg = h("CursorLine").bg, fg = h("Comment").fg, italic = true }
+            )
+            vim.api.nvim_set_hl(0, "SymbolUsageRef", { fg = h("Function").fg, bg = h("CursorLine").bg, italic = true })
+            vim.api.nvim_set_hl(0, "SymbolUsageDef", { fg = h("Type").fg, bg = h("CursorLine").bg, italic = true })
+            vim.api.nvim_set_hl(0, "SymbolUsageImpl", { fg = h("@keyword").fg, bg = h("CursorLine").bg, italic = true })
+
+            local function text_format(symbol)
+                local res = {}
+
+                local round_start = { "", "SymbolUsageRounding" }
+                local round_end = { "", "SymbolUsageRounding" }
+
+                -- Indicator that shows if there are any other symbols in the same line
+                local stacked_functions_content = symbol.stacked_count > 0 and ("+%s"):format(symbol.stacked_count)
+                or ""
+
+                if symbol.references then
+                    local usage = symbol.references <= 1 and "usage" or "usages"
+                    local num = symbol.references == 0 and "no" or symbol.references
+                    table.insert(res, round_start)
+                    table.insert(res, { "󰌹 ", "SymbolUsageRef" })
+                    table.insert(res, { ("%s %s"):format(num, usage), "SymbolUsageContent" })
+                    table.insert(res, round_end)
+                end
+
+                if symbol.definition then
+                    if #res > 0 then
+                        table.insert(res, { " ", "NonText" })
+                    end
+                    table.insert(res, round_start)
+                    table.insert(res, { "󰳽 ", "SymbolUsageDef" })
+                    table.insert(res, { symbol.definition .. " defs", "SymbolUsageContent" })
+                    table.insert(res, round_end)
+                end
+
+                if symbol.implementation then
+                    if #res > 0 then
+                        table.insert(res, { " ", "NonText" })
+                    end
+                    table.insert(res, round_start)
+                    table.insert(res, { "󰡱 ", "SymbolUsageImpl" })
+                    table.insert(res, { symbol.implementation .. " impls", "SymbolUsageContent" })
+                    table.insert(res, round_end)
+                end
+
+                if stacked_functions_content ~= "" then
+                    if #res > 0 then
+                        table.insert(res, { " ", "NonText" })
+                    end
+                    table.insert(res, round_start)
+                    table.insert(res, { " ", "SymbolUsageImpl" })
+                    table.insert(res, { stacked_functions_content, "SymbolUsageContent" })
+                    table.insert(res, round_end)
+                end
+
+                return res
+            end
+
+            require("symbol-usage").setup({
+                text_format = text_format,
+            })
+        end,
+    },
+}
diff --git a/lua/plug/ext_todo-comments.lua b/lua/plug/ext_todo-comments.lua
new file mode 100644
index 0000000..e0f8c4b
--- /dev/null
+++ b/lua/plug/ext_todo-comments.lua
@@ -0,0 +1,17 @@
+return {
+    {
+        -- FIX:  Tag Test
+        -- TODO: Tag test
+        -- HACK: Tag test
+        -- WARN: Tag test
+        -- PERF: Tag test
+        -- NOTE: Tag test
+        -- TEST: Tag test
+        "folke/todo-comments.nvim",
+        dependencies = { "nvim-lua/plenary.nvim" },
+        event = "VeryLazy",
+        config = function()
+            require("todo-comments").setup()
+        end,
+    },
+}
diff --git a/lua/plug/gui_bufferline.lua b/lua/plug/gui_bufferline.lua
new file mode 100644
index 0000000..9f06451
--- /dev/null
+++ b/lua/plug/gui_bufferline.lua
@@ -0,0 +1,35 @@
+return {
+    {
+        "akinsho/bufferline.nvim",
+        event = "VeryLazy",
+        version = "*",
+        dependencies = {
+            "nvim-tree/nvim-web-devicons",
+        },
+        opts = {
+            options = {
+                numbers = "buffer_id",
+                right_mouse_command = false,
+                -- underline
+                indicator = {
+                    icon = '▎',
+                    style = 'underline',
+                },
+                -- diagnostics
+                diagnostics = "nvim_lsp",
+                diagnostics_indicator = function(count, level)
+                    local icons = require("nvim-web-devicons").get_icons()
+                    local icon_error = icons.diagnostic_error.icon
+                    local icon_warn = icons.diagnostic_warn.icon
+                    local icon = level:match("error") and icon_error or icon_warn
+                    return " " .. icon .. " " .. count
+                end,
+                separator_style = "slant",
+                always_show_bufferline = false,
+            },
+        },
+        config = function(_, opts)
+            require("bufferline").setup(opts)
+        end,
+    },
+}
diff --git a/lua/plug/gui_colorscheme.lua b/lua/plug/gui_colorscheme.lua
new file mode 100644
index 0000000..ff5d581
--- /dev/null
+++ b/lua/plug/gui_colorscheme.lua
@@ -0,0 +1,40 @@
+return {
+    {
+        "folke/tokyonight.nvim",
+        config = function(_, opts)
+            vim.cmd.colorscheme("tokyonight-night")
+        end,
+    },
+    {
+        "loctvl842/monokai-pro.nvim",
+        event = "VeryLazy",
+        enabled = false,
+        opts = {
+            transparent_background = false,
+            terminal_colors = true,
+            devicons = true,
+            filter = "machine",
+            background_clear = {
+                "float_win",
+                "telescope",
+                "renamer",
+                "notify",
+                "neo-tree",
+            },
+            plugins = {
+                bufferline = {
+                    underline_selected = true,
+                    underline_visible = true,
+                },
+                indent_blankline = {
+                    context_highlight = "pro", -- default | pro
+                    context_start_underline = false,
+                },
+            },
+        },
+        config = function(_, opts)
+            require("monokai-pro").setup(opts)
+            vim.cmd.colorscheme("monokai-pro")
+        end,
+    },
+}
diff --git a/lua/plug/gui_filetree.lua b/lua/plug/gui_filetree.lua
new file mode 100644
index 0000000..ea8f967
--- /dev/null
+++ b/lua/plug/gui_filetree.lua
@@ -0,0 +1,30 @@
+return {
+    {
+        "nvim-neo-tree/neo-tree.nvim",
+        branch = "v3.x",
+        cmd = "Neotree",
+        dependencies = {
+            "nvim-lua/plenary.nvim",
+            "nvim-tree/nvim-web-devicons",
+            "MunifTanjim/nui.nvim",
+        },
+        opts = {
+            filesystem = {
+                follow_current_file = { enabled = true },
+            },
+        },
+        config = function(_, opts)
+            local icons = require("nvim-web-devicons").get_icons()
+            vim.fn.sign_define("DiagnosticSignError",
+                { text = icons.diagnostic_error.icon, texthl = "DiagnosticSignError"})
+            vim.fn.sign_define("DiagnosticSignWarn",
+                { text = icons.diagnostic_warn.icon, texthl = "DiagnosticSignWarn"})
+            vim.fn.sign_define("DiagnosticSignInfo",
+                { text = icons.diagnostic_info.icon, texthl = "DiagnosticSignInfo"})
+            vim.fn.sign_define("DiagnosticSignHint",
+                { text = icons.diagnostic_hint.icon, texthl = "DiagnosticSignHint"})
+
+            require("neo-tree").setup(opts)
+        end,
+    },
+}
diff --git a/lua/plug/gui_indentline.lua b/lua/plug/gui_indentline.lua
new file mode 100644
index 0000000..dbb1c97
--- /dev/null
+++ b/lua/plug/gui_indentline.lua
@@ -0,0 +1,45 @@
+return {
+    {
+        "lukas-reineke/indent-blankline.nvim",
+        event = "VeryLazy",
+        opts = {
+            indent = {
+                char = "│",
+                tab_char = "│",
+            },
+        },
+        main = "ibl",
+        config = function(_, opts)
+            require("ibl").setup(opts)
+        end,
+    },
+    {
+        "echasnovski/mini.indentscope",
+        version = false,
+        event = "VeryLazy",
+        opts = {
+            symbol = "│",
+            options = { try_as_border = true },
+        },
+        init = function()
+            vim.api.nvim_create_autocmd("FileType", {
+                pattern = {
+                    "help",
+                    "alpha",
+                    "dashboard",
+                    "neo-tree",
+                    "Trouble",
+                    "trouble",
+                    "lazy",
+                    "mason",
+                    "notify",
+                    "toggleterm",
+                    "lazyterm",
+                },
+                callback = function()
+                    vim.b.miniindentscope_disable = true
+                end,
+            })
+        end,
+    },
+}
diff --git a/lua/plug/gui_statusline.lua b/lua/plug/gui_statusline.lua
new file mode 100644
index 0000000..9547d67
--- /dev/null
+++ b/lua/plug/gui_statusline.lua
@@ -0,0 +1,20 @@
+return {
+    {
+        "nvim-lualine/lualine.nvim",
+        event = "VeryLazy",
+        dependencies = {
+            "nvim-tree/nvim-web-devicons",
+        },
+        opts = {
+            options = {
+                globalstatus = true,
+                theme = "molokai",
+                -- section_separators = { left = "", right = "" },
+                -- component_separators = { left = "", right = "" },
+            },
+        },
+        config = function(_, opts)
+            require("lualine").setup(opts)
+        end,
+    },
+}
diff --git a/lua/plug/gui_which-key.lua b/lua/plug/gui_which-key.lua
new file mode 100644
index 0000000..5d8ccf2
--- /dev/null
+++ b/lua/plug/gui_which-key.lua
@@ -0,0 +1,25 @@
+return {
+    {
+        "folke/which-key.nvim",
+        event = "VeryLazy",
+        init = function()
+            vim.o.timeout = true
+            vim.o.timeoutlen = 300
+        end,
+        config = function()
+            local wk = require("which-key")
+            wk.add({
+                { "<leader>f", group = "File" },
+                { "<leader>fo", ":Neotree position=float<cr>", desc = "open" },
+                { "<leader>fx", ":q<cr>", desc = "exit" },
+                { "<leader>v", group = "View" },
+                { "<leader>vf", ":Neotree position=left toggle<cr>", desc = "explorer" },
+                { "<leader>vo", ":AerialToggle<cr>", desc = "outline" },
+                { "<leader>b", group = "Buffer" },
+                { "<leader>bn", ":bn<cr>", desc = "next" },
+                { "<leader>bp", ":bp<cr>", desc = "prev" },
+                { "<leader>bd", ":bd<cr>", desc = "delete" },
+            })
+        end,
+    },
+}
diff --git a/lua/plug/libraries.lua b/lua/plug/libraries.lua
new file mode 100644
index 0000000..3f42fa1
--- /dev/null
+++ b/lua/plug/libraries.lua
@@ -0,0 +1,36 @@
+return {
+    -- Provides Nerd Font icons (glyphs) for use by neovim plugins
+    {
+        "nvim-tree/nvim-web-devicons",
+        config = function()
+            require("nvim-web-devicons").set_icon({
+                diagnostic_error = {
+                    icon = "",
+                    color = "#e8274b",
+                    name = "DiagnosticError"
+                },
+                diagnostic_warn = {
+                    icon = "",
+                    color = "#cbcb41",
+                    name = "DiagnosticWarn"
+                },
+                diagnostic_info = {
+                    icon = "",
+                    color = "#00c58e",
+                    name = "DiagnosticInfo"
+                },
+                diagnostic_hint = {
+                    icon = "󰌵",
+                    name = "DiagnosticHint"
+                },
+            })
+        end,
+    },
+    -- plenary: full; complete; entire; absolute; unqualified.
+    -- All the lua functions I don't want to write twice.
+    { "nvim-lua/plenary.nvim" },
+    -- UI Component Library for Neovim.
+    { "MunifTanjim/nui.nvim" },
+    -- Promise & Async in Lua
+    { "kevinhwang91/promise-async" },
+}
diff --git a/lua/plug/lsp_completion.lua b/lua/plug/lsp_completion.lua
new file mode 100644
index 0000000..5061c66
--- /dev/null
+++ b/lua/plug/lsp_completion.lua
@@ -0,0 +1,93 @@
+return {
+    {
+        "hrsh7th/nvim-cmp",
+        event = "VeryLazy",
+        dependencies = {
+            -- sources
+            { "hrsh7th/cmp-nvim-lsp" },
+            { "hrsh7th/cmp-nvim-lua" },
+            { "hrsh7th/cmp-buffer" },
+            { "hrsh7th/cmp-path" },
+            { "hrsh7th/cmp-nvim-lsp-document-symbol" },
+            -- snippets
+            { "L3MON4D3/LuaSnip" },
+            { "saadparwaiz1/cmp_luasnip" },
+            { "rafamadriz/friendly-snippets" },
+            -- lsp diagnostics
+            { "hrsh7th/cmp-nvim-lsp-signature-help" },
+            { "onsails/lspkind.nvim" },
+        },
+        config = function()
+            local cmp = require("cmp")
+            local lspkind = require("lspkind")
+            local luasnip = require("luasnip")
+
+            cmp.setup({
+                snippet = {
+                    expand = function(args)
+                        require("luasnip").lsp_expand(args.body) -- Luasnip expand
+                    end,
+                },
+                window = {
+                    completion = { border = "rounded" },
+                    documentation = { border = "rounded" },
+                },
+                mapping = {
+                    ["<CR>"] = cmp.mapping(function(fallback)
+                        if cmp.visible() then
+                            if luasnip.expandable() then
+                                luasnip.expand()
+                            else
+                                cmp.confirm({ select = true })
+                            end
+                        else
+                            fallback()
+                        end
+                    end),
+                    ["<Tab>"] = cmp.mapping(function(fallback)
+                        if cmp.visible() then
+                            cmp.select_next_item()
+                        elseif luasnip.locally_jumpable(1) then
+                            luasnip.jump(1)
+                        else
+                            fallback()
+                        end
+                    end, { "i", "s" }),
+                    ["S-<Tab>"] = cmp.mapping(function(fallback)
+                        if cmp.visible() then
+                            cmp.select_prev_item()
+                        elseif luasnip.locally_jumpable(-1) then
+                            luasnip.jump(-1)
+                        else
+                            fallback()
+                        end
+                    end, { "i", "s" }),
+                },
+                sources = cmp.config.sources({
+                    { name = "nvim_lsp" },
+                    { name = "nvim_lsp_signature_help" },
+                    { name = "nvim_lsp_document_symbol" },
+                    { name = "nvim_lua" },
+                    { name = "luasnip" },
+                }, {
+                    { name = "buffer" },
+                    { name = "path" },
+                }),
+                formatting = {
+                    format = lspkind.cmp_format({
+                        mode = "symbol_text",
+                        maxwidth = function() return math.floor(0.5 * vim.o.columns) end,
+                        ellipsis_char = "...",
+                        show_labelDetails = true,
+                        before = function(_, vim_item)
+                            return vim_item
+                        end,
+                    }),
+                },
+            })
+
+            -- Add snippets from Friendly Snippets
+            require("luasnip/loaders/from_vscode").lazy_load()
+        end,
+    },
+}
diff --git a/lua/plug/lsp_lspconfig.lua b/lua/plug/lsp_lspconfig.lua
new file mode 100644
index 0000000..df8a081
--- /dev/null
+++ b/lua/plug/lsp_lspconfig.lua
@@ -0,0 +1,80 @@
+return {
+    {
+        "mason-org/mason.nvim",
+        opts = {
+            ui = {
+                icons = {
+                    package_installed = "✓",
+                    package_pending = "➜",
+                    package_uninstalled = "✗",
+                },
+            },
+        },
+        config = function(_, opts)
+            require("mason").setup(opts)
+        end,
+    },
+    {
+        "mason-org/mason-lspconfig.nvim",
+        event = "VeryLazy",
+        dependencies = {
+            { "mason-org/mason.nvim" },
+            { "neovim/nvim-lspconfig" },
+            { "folke/neodev.nvim" },
+        },
+        config = function()
+            -- setup lsps
+            vim.lsp.config('lua_ls', {
+                settings = {
+                    Lua = {
+                        hint = { enable = true },
+                        runtime = { version = "LuaJIT" },
+                        diagnostics = { globals = { "vim", "require" } },
+                        workspace = {
+                            checkThirdParty = true,
+                            library = {
+                                [vim.fn.expand("$VIMRUNTIME/lua")] = true,
+                                [vim.fn.expand("$VIMRUNTIME/lua/vim/lsp")] = true,
+                            },
+                        },
+                    },
+                },
+            })
+
+            require("mason-lspconfig").setup {
+                ensure_installed = { "lua_ls", "vimls", "bashls" },
+                automatic_enable = { 'lua_ls', 'vimls', 'bashls' }
+            }
+            require("neodev").setup()
+
+            -- setup keymaps
+            vim.api.nvim_create_autocmd("LspAttach", {
+                callback = function(_)
+                    -- local fn_format = function()
+                        -- vim.lsp.buf.format({ async = true })
+                    -- end
+                    -- hover
+                    vim.keymap.set("n", "K", vim.lsp.buf.hover, { desc = "hover (K)" })
+                    -- vim.keymap.set("n", "<leader>lah", vim.lsp.buf.hover, { desc = "hover (K)" })
+                    -- format
+                    -- vim.keymap.set({ "n", "v" }, "<leader>laf", fn_format, { desc = "formatting" })
+                    -- rename
+                    -- vim.keymap.set({ "n", "v" }, "<leader>lar", vim.lsp.buf.rename, { desc = "rename" })
+                    -- code_action
+                    -- vim.keymap.set({ "n", "v" }, "<leader>laa", vim.lsp.buf.code_action, { desc = "code_action" })
+
+                    -- definition
+                    -- vim.keymap.set("n", "<leader>lgd", vim.lsp.buf.definition, { desc = "definition" })
+                    -- declaration
+                    -- vim.keymap.set("n", "<leader>lgD", vim.lsp.buf.declaration, { desc = "declaration" })
+                    -- implementation
+                    -- vim.keymap.set("n", "<leader>lgi", vim.lsp.buf.implementation, { desc = "implementation" })
+                    -- references
+                    -- vim.keymap.set("n", "<leader>lgr", vim.lsp.buf.references, { desc = "references" })
+                    -- type_definition
+                    -- vim.keymap.set("n", "<leader>lgt", vim.lsp.buf.type_definition, { desc = "type_definition" })
+                end,
+            })
+        end,
+    },
+}
diff --git a/lua/plug/lsp_signature.lua b/lua/plug/lsp_signature.lua
new file mode 100644
index 0000000..421fe99
--- /dev/null
+++ b/lua/plug/lsp_signature.lua
@@ -0,0 +1,9 @@
+return {
+    {
+        "ray-x/lsp_signature.nvim",
+        event = "LspAttach",
+        config = function()
+            require("lsp_signature").setup({})
+        end,
+    },
+}
diff --git a/lua/plug/ts_folding.lua b/lua/plug/ts_folding.lua
new file mode 100644
index 0000000..66cfd9a
--- /dev/null
+++ b/lua/plug/ts_folding.lua
@@ -0,0 +1,57 @@
+return {
+    {
+        "kevinhwang91/nvim-ufo",
+        event = "VeryLazy",
+        dependencies = {
+            "kevinhwang91/promise-async",
+            "nvim-treesitter/nvim-treesitter",
+        },
+        config = function()
+            vim.o.foldenable = true
+            vim.o.foldcolumn = "1"
+            vim.o.foldlevel = 99
+            vim.o.foldlevelstart = 99
+
+            -- vim.keymap.set("n", "zR", require("ufo").openAllFolds)
+            -- vim.keymap.set("n", "zM", require("ufo").closeAllFolds)
+
+            local handler = function(virtText, lnum, endLnum, width, truncate)
+                local newVirtText = {}
+                local suffix = (" 󰁂 %d "):format(endLnum - lnum)
+                local sufWidth = vim.fn.strdisplaywidth(suffix)
+                local targetWidth = width - sufWidth
+                local curWidth = 0
+                for _, chunk in ipairs(virtText) do
+                    local chunkText = chunk[1]
+                    local chunkWidth = vim.fn.strdisplaywidth(chunkText)
+                    if targetWidth > curWidth + chunkWidth then
+                        table.insert(newVirtText, chunk)
+                    else
+                        chunkText = truncate(chunkText, targetWidth - curWidth)
+                        local hlGroup = chunk[2]
+                        table.insert(newVirtText, { chunkText, hlGroup })
+                        chunkWidth = vim.fn.strdisplaywidth(chunkText)
+                        -- str width returned from truncate() may less than 2nd argument, need padding
+                        if curWidth + chunkWidth < targetWidth then
+                            suffix = suffix .. (" "):rep(targetWidth - curWidth - chunkWidth)
+                        end
+                        break
+                    end
+                    curWidth = curWidth + chunkWidth
+                end
+                table.insert(newVirtText, { suffix, "MoreMsg" })
+                return newVirtText
+            end
+
+            -- Option 3: treesitter as a main provider instead
+            -- (Note: the `nvim-treesitter` plugin is *not* needed.)
+            require("ufo").setup({
+                provider_selector = function(bufnr, filetype, buftype)
+                    return { "treesitter", "indent" }
+                end,
+                fold_virt_text_handler = handler,
+            })
+        end,
+    },
+}
+
diff --git a/lua/plug/ts_outline.lua b/lua/plug/ts_outline.lua
new file mode 100644
index 0000000..91d1af8
--- /dev/null
+++ b/lua/plug/ts_outline.lua
@@ -0,0 +1,13 @@
+return {
+    {
+        "stevearc/aerial.nvim",
+        cmd = "AerialToggle",
+        dependencies = {
+            "nvim-treesitter/nvim-treesitter",
+            "nvim-tree/nvim-web-devicons",
+        },
+        config = function()
+            require("aerial").setup()
+        end,
+    },
+}
diff --git a/lua/plug/ts_treesitter.lua b/lua/plug/ts_treesitter.lua
new file mode 100644
index 0000000..177b89a
--- /dev/null
+++ b/lua/plug/ts_treesitter.lua
@@ -0,0 +1,19 @@
+return {
+    {
+        "nvim-treesitter/nvim-treesitter",
+        build = ":TSUpdate",
+        event = { "BufReadPost", "BufNewFile" },
+        opts = {
+            ensure_installed = { "c", "lua", "vim", "vimdoc", "javascript", "html" },
+            sync_install = false,
+            highlight = {
+                enable = true,
+                additional_vim_regex_highlighting = false,
+            },
+            indent = { enable = true },
+        },
+        config = function(_, opts)
+            require("nvim-treesitter.configs").setup(opts)
+        end,
+    },
+}
diff --git a/lua/util/icon.lua b/lua/util/icon.lua
new file mode 100644
index 0000000..be874a9
--- /dev/null
+++ b/lua/util/icon.lua
@@ -0,0 +1,30 @@
+local M = {
+    diagnostics = {
+        error = "",
+        warn  = "",
+        info  = "",
+        hint  = "󰌵",
+    },
+}
+
+function M.sign_defines()
+    local icons = M.diagnostics
+    -- error
+    local sign_diag_error = { text = icons.error, texthl = "DiagnosticSignError" }
+    vim.fn.sign_define("DiagnosticSignError", sign_diag_error)
+    -- warn
+    local sign_diag_warn = { text = icons.warn, texthl = "DiagnosticSignWarn" }
+    vim.fn.sign_define("DiagnosticSignWarn", sign_diag_warn)
+    -- info
+    local sign_diag_info = { text = icons.info, texthl = "DiagnosticSignInfo" }
+    vim.fn.sign_define("DiagnosticSignInfo", sign_diag_info)
+    -- hint
+    local sign_diag_hint = { text = icons.hint, texthl = "DiagnosticSignHint" }
+    vim.fn.sign_define("DiagnosticSignHint", sign_diag_hint)
+end
+
+function M.setup()
+    M.sign_defines()
+end
+
+return M
diff --git a/lua/util/lsp.lua b/lua/util/lsp.lua
new file mode 100644
index 0000000..ae672e2
--- /dev/null
+++ b/lua/util/lsp.lua
@@ -0,0 +1,17 @@
+local M = {}
+
+function M.setup_keys()
+    vim.api.nvim_create_autocmd("LspAttach", {
+        callback = function()
+            local map = vim.keymap.set
+
+            map("n", "K", vim.lsp.buf.hover, { desc = "hover" })
+        end
+    })
+end
+
+function M.setup()
+    M.setup_keys()
+end
+
+return M
diff --git a/lua/util/path.lua b/lua/util/path.lua
new file mode 100644
index 0000000..8cb87cd
--- /dev/null
+++ b/lua/util/path.lua
@@ -0,0 +1,56 @@
+local M = {}
+
+function M.sep()
+    return vim.fn.has("win32") and "\\" or "/"
+end
+
+function M.normalize(path)
+    local parts = {}
+    for part in path:gmatch("([^/\\\\]*)") do
+        if part ~= "" then
+            table.insert(parts, part)
+        end
+    end
+    local path_joined = table.concat(parts, M.sep())
+
+    local first_char = path:sub(1, 1)
+    if first_char == "/" or first_char == "\\" then
+        path_joined = M.sep() .. path_joined
+    end
+    local last_char = path:sub(path:len())
+    if last_char == "/" or last_char == "\\" then
+        path_joined = path_joined .. M.sep()
+    end
+    return vim.fn.expand(path_joined)
+end
+
+function M.join(base_path, ...)
+    local parts = { base_path }
+    for _, part in ipairs({ ... }) do
+        table.insert(parts, part)
+    end
+
+    local path_joined = table.concat(parts, M.sep())
+    return M.normalize(path_joined)
+end
+
+function M.join_stdpath(what, ...)
+    local base_path = vim.fn.stdpath(what)
+    local parts = { base_path }
+    for _, part in ipairs({ ... }) do
+        table.insert(parts, part)
+    end
+
+    local path_joined = table.concat(parts, M.sep())
+    return M.normalize(path_joined)
+end
+
+function M.is_directory(path)
+    return vim.fn.isdirectory(M.normalize(path)) == 1
+end
+
+function M.is_file(path)
+    return vim.fn.filereadable(M.normalize(path)) == 1
+end
+
+return M