diff --git a/lua/Filetype/markdown.lua b/lua/Filetype/markdown.lua
index 2b8d825..8431359 100644
--- a/lua/Filetype/markdown.lua
+++ b/lua/Filetype/markdown.lua
@@ -1,9 +1,10 @@
-local G = require("core.G")
-local TogglePreview = "<Plug>MarkdownPreviewToggle"
+local G = require("G")
+
+G.cmd("au VimEnter * :MarkdownPreview")
 
 --set to 1, nvim will open the preview window after entering the markdown buffer
 --default: 0
-G.g.mkdp_auto_start = 1
+G.g.mkdp_auto_start = 0
 
 --set to 1, the nvim will auto close current preview window when change
 --from markdown buffer to another buffer
@@ -81,6 +82,7 @@ G.g.mkdp_browserfunc = ''
 --      ]])
 --use a custom markdown style must be absolute path
 --like '/Users/username/markdown.css' or expand('~/markdown.css')
+
 G.g.mkdp_markdown_css = ''
 
 --use a custom highlight style must absolute path
diff --git a/lua/G.lua b/lua/G.lua
index 68c2fbe..1944861 100644
--- a/lua/G.lua
+++ b/lua/G.lua
@@ -34,6 +34,10 @@ function G.eval(c)
     return G.api.nvim_eval(c)
 end
 
+function G.au(c)
+    return G.api.nvim_create_autocmd(c)
+end
+
 G.g.mapleader = ' '
 
 return G
diff --git a/lua/core/options.lua b/lua/core/options.lua
index 85acd0f..44077fd 100644
--- a/lua/core/options.lua
+++ b/lua/core/options.lua
@@ -52,17 +52,12 @@ G.api.nvim_create_autocmd({ "BufEnter" }, {
 	end,
 })
 
-local require_markdown = {}
-
-function require_markdown()
-  require('Filetype.markdown')
-  G.cmd('MarkdownPreviewToggle')
-end
-
-G.api.nvim_create_autocmd(
-	{"FileType"}, {
+G.api.nvim_create_autocmd( {"FileType"}, {
     pattern = "markdown",
-    callback = require_markdown
+    callback = function() 
+      require('Filetype.markdown')
+      --G.cmd('MarkdownPreview')
+    end
   }
 )