diff --git a/playground/init_lazy.lua b/playground/init_lazy.lua
new file mode 100644
index 0000000..91d7d96
--- /dev/null
+++ b/playground/init_lazy.lua
@@ -0,0 +1,106 @@
+vim.cmd([[set runtimepath=$VIMRUNTIME]])
+vim.cmd([[set packpath=/tmp/nvim/lazy]])
+
+local package_root = '/tmp/nvim/lazy'
+local plugin_folder = function()
+  local host = os.getenv('HOST_NAME')
+  if host and (host:find('Ray') or host:find('ray')) then
+    return [[~/github/ray-x]] -- vim.fn.expand("$HOME") .. '/github/'
+  else
+    return ''
+  end
+end
+
+local lazypath = package_root .. '/lazy.nvim'
+if not vim.loop.fs_stat(lazypath) then
+  vim.fn.system({
+    'git',
+    'clone',
+    '--filter=blob:none',
+    'https://github.com/folke/lazy.nvim.git',
+    '--branch=stable', -- latest stable release
+    lazypath,
+  })
+end
+vim.opt.rtp:prepend(lazypath)
+local function load_plugins()
+  return {
+    {
+      'nvim-treesitter/nvim-treesitter',
+      config = function()
+        require('nvim-treesitter.configs').setup({
+          ensure_installed = { 'go' },
+          highlight = { enable = true },
+        })
+      end,
+      build = ':TSUpdate',
+    },
+    { 'neovim/nvim-lspconfig' },
+    {
+      'simrat39/rust-tools.nvim',
+      config = function()
+        require('rust-tools').setup({
+          server = {
+            on_attach = function(client, bufnr)
+              require('navigator.lspclient.mapping').setup({ client = client, bufnr = bufnr }) -- setup navigator keymaps here,
+              -- otherwise, you can define your own commands to call navigator functions
+            end,
+          },
+        })
+      end,
+    },
+    { 'ray-x/lsp_signature.nvim', dev = (plugin_folder() ~= '') },
+    {
+      'ray-x/navigator.lua',
+      dev = (plugin_folder() ~= ''),
+      -- '~/github/ray-x/navigator.lua',
+      dependencies = { 'ray-x/guihua.lua', build = 'cd lua/fzy && make' },
+      config = function()
+        require('navigator').setup({
+          lsp = {
+            -- disable_lsp = { 'rust_analyzer', 'clangd' },
+          },
+        })
+      end,
+    },
+    {
+      'ray-x/go.nvim',
+      dev = (plugin_folder() ~= ''),
+      -- dev = true,
+      ft = 'go',
+      dependencies = {
+        'mfussenegger/nvim-dap', -- Debug Adapter Protocol
+        'rcarriga/nvim-dap-ui',
+        'theHamsta/nvim-dap-virtual-text',
+        'ray-x/guihua.lua',
+      },
+      config = function()
+        require('go').setup({
+          verbose = true,
+          lsp_cfg = {
+            handlers = {
+              ['textDocument/hover'] = vim.lsp.with(vim.lsp.handlers.hover, { border = 'double' }),
+              ['textDocument/signatureHelp'] = vim.lsp.with(
+                vim.lsp.handlers.signature_help,
+                { border = 'round' }
+              ),
+            },
+          }, -- false: do nothing
+        })
+      end,
+    },
+  }
+end
+
+local opts = {
+  root = package_root, -- directory where plugins will be installed
+  default = { lazy = true },
+  dev = {
+    -- directory where you store your local plugin projects
+    path = plugin_folder(),
+  },
+}
+
+require('lazy').setup(load_plugins(), opts)
+
+vim.cmd('colorscheme murphy')
diff --git a/playground/rust/Cargo.toml b/playground/rust/Cargo.toml
new file mode 100755
index 0000000..2f25955
--- /dev/null
+++ b/playground/rust/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "hello"
+version = "0.1.0"
+authors = ["Ray-X <rayx.cn@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/playground/rust/src/main.rs b/playground/rust/src/main.rs
new file mode 100755
index 0000000..876811b
--- /dev/null
+++ b/playground/rust/src/main.rs
@@ -0,0 +1,79 @@
+use std::io;
+
+trait Show {
+    fn show(&self) -> String;
+}
+
+impl Show for i32 {
+    fn show(&self) -> String {
+        format!("four-byte signed {}", self)
+    }
+}
+
+impl Show for f64 {
+    fn show(&self) -> String {
+        format!("eight-byte float {}", self)
+    }
+}
+fn another_function(x: i32, y: i32) {
+    println!("The value of x is: {}, y {}", x, y);
+}
+fn fun1(x: i32, y: i32) {
+    println!("The value of x is: {}, y {}", x, y);
+}
+
+fn add(left: i32, right: i32) -> i32 {
+    return left + right;
+}
+
+fn add4(left: i32, right: i32, t: i32, f: i32) -> i32 {
+    return left + right + t + f;
+}
+
+struct Foo<'a> {
+    x: &'a i32,
+}
+struct Boo<'b> {
+    x: &'b i32,
+}
+
+const CAMEL_CASE: i32 = 42;
+
+fn bug(left: i32, rigth: i32) -> i32 {
+    return left;
+}
+
+fn test_signature(a: i32, b: i32, c: i32) -> i32 {
+    a + b - c
+}
+fn test(a: i32) {}
+fn test2() {
+    test(1)
+}
+fn test3() {
+    test(1);
+    test2()
+}
+
+fn main() {
+    test_signature(1, 2, 3);
+    let x = || 42;
+    bug(x(), 32);
+    bug(x(), 32);
+
+    add(add(1, 2), 3);
+    add(add(1, 2), 3);
+    let answer = 42;
+    let maybe_pi = 3.14;
+    let v: Vec<&Show> = vec![&answer, &maybe_pi];
+    for d in v.iter() {
+        println!("show {}", d.show());
+    }
+    add4(1, 2, 3, add(1, 2));
+    add4(add(1, 2), 3, add(3, 4), 4);
+    let y = &5; // this is the same as `let _y = 5; let y = &_y;`
+    let f = Foo { x: y };
+    let z = &5; // this is the same as `let _y = 5; let y = &_y;`
+    let f22 = Boo { x: z };
+    another_function(11, 2);
+}