diff --git a/lua/Trans/backend/init.lua b/lua/Trans/backend/init.lua
new file mode 100644
index 0000000..aa9237c
--- /dev/null
+++ b/lua/Trans/backend/init.lua
@@ -0,0 +1,13 @@
+local M = {}
+
+
+M.__index = function(tbl, k)
+    local res, engine = pcall(require, 'Trans.backend.' .. k)
+    assert(res, [[Can't Found Engine:]] .. k)
+
+    tbl[k] = engine
+    return engine
+end
+
+
+return setmetatable(M, M)
diff --git a/lua/Trans/health.lua b/lua/Trans/health.lua
new file mode 100644
index 0000000..90b569d
--- /dev/null
+++ b/lua/Trans/health.lua
@@ -0,0 +1,63 @@
+local M = {}
+
+M.check = function()
+    local health = vim.health
+    local ok     = health.report_ok
+    local warn   = health.report_warn
+    local error  = health.report_error
+
+
+    local has        = vim.fn.has
+    local executable = vim.fn.executable
+
+    -- INFO :Check neovim version
+    if has('nvim-0.9') == 1 then
+        ok [[
+        [PASS]: you have Trans.nvim with full features in neovim-nightly
+        ]]
+    else
+        warn [[
+        [WARN]: Trans Title requires Neovim 0.9 or newer
+        See neovim-nightly: https://github.com/neovim/neovim/releases/tag/nightly
+        ]]
+    end
+
+    -- INFO :Check Sqlite
+    local has_sqlite = pcall(require, 'sqlite')
+    if has_sqlite then
+        ok [[
+        [PASS]: Dependency sqlite.lua is installed
+        ]]
+    else
+        error [[
+        [ERROR]: Dependency sqlite.lua can't work correctly
+        Please Read the doc in github carefully
+        ]]
+    end
+
+    if executable('sqlite3') then
+        ok [[
+        [PASS]: Dependency sqlite3 found
+        ]]
+    else
+        error [[
+        [ERROR]: Dependency sqlite3 not found
+        ]]
+    end
+
+
+    -- INFO :Check stardict
+    local db_path = vim.fn.expand(require('Trans').conf.db_path)
+    if vim.fn.filereadable(db_path) == 1 then
+        ok [[
+        [PASS]: Stardict database found
+        ]]
+    else
+        error [[
+        [PASS]: Stardict database not found
+        Please check the doc in github
+        ]]
+    end
+end
+
+return M
diff --git a/lua/Trans/init.lua b/lua/Trans/init.lua
index 85f018f..8199140 100644
--- a/lua/Trans/init.lua
+++ b/lua/Trans/init.lua
@@ -6,10 +6,10 @@ if fn.executable('sqlite3') ~= 1 then
 end
 
 local win_title = fn.has('nvim-0.9') == 1 and {
-    { '', 'TransTitleRound' },
-    { ' Trans', 'TransTitle' },
-    { '', 'TransTitleRound' },
-} or nil
+        { '',       'TransTitleRound' },
+        { ' Trans', 'TransTitle' },
+        { '',       'TransTitleRound' },
+    } or nil
 
 -- local title = {
 --     "████████╗██████╗  █████╗ ███╗   ██╗███████╗",
@@ -33,13 +33,13 @@ string.isEn = function(self)
 end
 
 string.play = fn.has('linux') == 1 and function(self)
-    local cmd = ([[echo "%s" | festival --tts]]):format(self)
-    fn.jobstart(cmd)
-end or function(self)
-    local seperator = fn.has('unix') and '/' or '\\'
-    local file = debug.getinfo(1, "S").source:sub(2):match('(.*)lua') .. seperator .. 'tts' .. seperator .. 'say.js'
-    fn.jobstart('node ' .. file .. ' ' .. self)
-end
+        local cmd = ([[echo "%s" | festival --tts]]):format(self)
+        fn.jobstart(cmd)
+    end or function(self)
+        local seperator = fn.has('unix') and '/' or '\\'
+        local file = debug.getinfo(1, "S").source:sub(2):match('(.*)lua') .. seperator .. 'tts' .. seperator .. 'say.js'
+        fn.jobstart('node ' .. file .. ' ' .. self)
+    end
 
 M.conf = {
     view = {
@@ -118,31 +118,9 @@ M.conf = {
         -- no = '❌'
     },
     theme = 'default',
-    -- theme = 'dracula',
-    -- theme = 'tokyonight',
-
     db_path = '$HOME/.vim/dict/ultimate.db',
-    engine = {
-        youdao = {},
-        -- baidu = {
-        --     appid = '',
-        --     appPasswd = '',
-        -- },
-        -- -- youdao = {
-        --     appkey = '',
-        --     appPasswd = '',
-        -- },
-    },
-    -- TODO :
-    -- register word
-    -- history = {
-    --     -- TOOD
-    -- }
-
-    -- TODO :add online translate engine
 }
 
-local times = 0
 M.setup = function(opts)
     if opts then
         M.conf = vim.tbl_deep_extend('force', M.conf, opts)
@@ -165,26 +143,11 @@ M.setup = function(opts)
     end
 
     conf.engines = engines
-    times = times + 1
-    if times == 1 then
-        ---@format disable
-        local new_command = api.nvim_create_user_command
-        new_command('Translate'      , function() M.translate()    end, { desc = '  单词翻译',})
-        new_command('TranslateInput' , function() M.translate('i') end, { desc = '  搜索翻译',})
-        new_command('TransPlay'      , function()
-            local word = M.get_word(api.nvim_get_mode().mode)
-            if word ~= '' and word:isEn() then
-                word:play()
-            end
-        end, { desc = ' 自动发音' })
 
-
-        local set_hl = api.nvim_set_hl
-        local hls    = require('Trans.ui.theme')[conf.theme]
-        for hl, opt in pairs(hls) do
-            set_hl(0, hl, opt)
-        end
-        ---@format enable
+    local set_hl = api.nvim_set_hl
+    local hls    = require('Trans.ui.theme')[conf.theme]
+    for hl, opt in pairs(hls) do
+        set_hl(0, hl, opt)
     end
 end
 
@@ -207,7 +170,6 @@ local function get_select()
 
     if s_row == e_row then
         return line:sub(s_col, e_col)
-
     else
         local lines = fn.getline(s_row, e_row)
         local i = #lines
@@ -221,11 +183,9 @@ M.get_word = function(mode)
     local word
     if mode == 'n' then
         word = fn.expand('<cword>')
-
     elseif mode == 'v' then
         api.nvim_input('<ESC>')
         word = get_select()
-
     elseif mode == 'i' then
         -- TODO Use Telescope with fuzzy finder
         ---@diagnostic disable-next-line: param-type-mismatch
diff --git a/plugin/Trans.lua b/plugin/Trans.lua
new file mode 100644
index 0000000..03292be
--- /dev/null
+++ b/plugin/Trans.lua
@@ -0,0 +1,13 @@
+local api = vim.api
+
+
+local M = require('Trans')
+local new_command = api.nvim_create_user_command
+new_command('Translate', function() M.translate() end, { desc = '  单词翻译', })
+new_command('TranslateInput', function() M.translate('i') end, { desc = '  搜索翻译', })
+new_command('TransPlay', function()
+    local word = M.get_word(api.nvim_get_mode().mode)
+    if word ~= '' and word:isEn() then
+        word:play()
+    end
+end, { desc = ' 自动发音' })