diff --git a/README.md b/README.md
index 43768100..5f6471fe 100644
--- a/README.md
+++ b/README.md
@@ -136,7 +136,6 @@ Global configurations
 | `g:easycomplete_diagnostics_enable`  | 1             | Enable diagnostics                                            |
 | `g:easycomplete_signature_enable`    | 1             | Enable signature                                              |
 | `g:easycomplete_diagnostics_hover`   | 1             | Gives a diagnostic prompt when the cursor holds               |
-| `g:easycomplete_scheme`              | `""`          | Popup menu colorscheme                                        |
 
 Typing `:h easycomplete` for help.
 
@@ -264,8 +263,6 @@ Disable TabNine inline suggestion: `let g:easycomplete_tabnine_suggestion = 0`.
 
 ## Beautify the vim completion menu
 
-There are four build-in popup menu themes in cterm: `blue`,`light`,`rider` and `sharp`(for iterm). (`let g:easycomplete_scheme="sharp"`).
-
 If you just want to use default nerdfonts configuration, you can simplily config `g:easycomplete_nerd_font = 1`
 
 If you want to customize the kind icon, you can modify the configuration with <https://nerdfonts.com> installed. [Examples](beautify-menu-items.md).
diff --git a/autoload/easycomplete.vim b/autoload/easycomplete.vim
index 8ef78359..ee86f2aa 100644
--- a/autoload/easycomplete.vim
+++ b/autoload/easycomplete.vim
@@ -100,7 +100,6 @@ function! easycomplete#_enable()
   call s:ConstructorCalling()
   doautocmd <nomodeline> User easycomplete_after_constructor
   call s:SetupCompleteCache()
-  call easycomplete#ui#SetScheme()
   " lsp 服务初始化必须要放在按键绑定之后
   if !easycomplete#sources#deno#IsTSOrJSFiletype() || easycomplete#sources#deno#IsDenoProject()
     call easycomplete#lsp#enable()
diff --git a/autoload/easycomplete/popup.vim b/autoload/easycomplete/popup.vim
index 844dca7e..6ff4f459 100644
--- a/autoload/easycomplete/popup.vim
+++ b/autoload/easycomplete/popup.vim
@@ -505,6 +505,7 @@ function! s:NVimShow(opt, windowtype, float_type)
   if a:windowtype == "float" && a:float_type == "signature"
     if has("nvim-0.9.0")
       call setbufvar(winbufnr(winid), '&filetype', 'markdown')
+      call setbufvar(winbufnr(winid), '&conceallevel', 3)
     endif
     call easycomplete#ui#ApplyMarkdownSyntax(winid)
   endif
diff --git a/autoload/easycomplete/ui.vim b/autoload/easycomplete/ui.vim
index 68ea05bd..091cb02a 100644
--- a/autoload/easycomplete/ui.vim
+++ b/autoload/easycomplete/ui.vim
@@ -1,43 +1,3 @@
-" Cterm 下默认四种菜单样式
-" 支持四种 dark, light, rider, sharp
-" Set Scheme {{{
-function! easycomplete#ui#SetScheme()
-  if !exists("g:easycomplete_scheme")
-    return
-  endif
-  " hi Pmenu      ctermfg=111 ctermbg=235
-  " hi PmenuSel   ctermfg=255 ctermbg=238
-  " hi PmenuSbar              ctermbg=235
-  " hi PmenuThumb             ctermbg=234
-  let l:scheme_config = {
-        \   'light': [[234, 251], [255, 26], [-1,  251], [-1,  247]],
-        \   'rider': [[251, 237], [231, 25], [-1,  237], [-1,  239]],
-        \   'sharp': [[255, 237], [235, 255], [-1, 245], [-1,  255]],
-        \   'blue':  [['White', 'DarkBlue'], ['Red', 'White'], [-1, 245],[-1,  255]],
-        \ }
-  if has_key(l:scheme_config, g:easycomplete_scheme) && g:env_is_iterm == v:false
-    let sch = l:scheme_config[g:easycomplete_scheme]
-    let hiPmenu =      ['hi','Pmenu',      'ctermfg='.sch[0][0], 'ctermbg='.sch[0][1]]
-    let hiPmenuSel =   ['hi','PmenuSel',   'ctermfg='.sch[1][0], 'ctermbg='.sch[1][1]]
-    let hiPmenuSbar =  ['hi','PmenuSbar',  '',                   'ctermbg='.sch[2][1]]
-    let hiPmenuThumb = ['hi','PmenuThumb', '',                   'ctermbg='.sch[3][1]]
-    execute join(hiPmenu, ' ')
-    execute join(hiPmenuSel, ' ')
-    execute join(hiPmenuSbar, ' ')
-    execute join(hiPmenuThumb, ' ')
-  endif
-
-  if g:env_is_iterm == v:true
-    if g:easycomplete_scheme == 'sharp'
-      hi! PMenu guifg=#d4d4d4 guibg=#252526 gui=NONE
-      hi! PmenuSel guifg=#ffffff guibg=#04395e gui=NONE
-      hi! PmenuSbar guibg=#252526
-      hi! PmenuThumb guibg=#474747
-    endif
-
-  endif
-endfunction " }}}
-
 " markdown syntax {{{
 function! easycomplete#ui#ApplyMarkdownSyntax(winid)
   " 默认 Popup 的 Markdown 文档都基于 help syntax
@@ -47,7 +7,8 @@ function! easycomplete#ui#ApplyMarkdownSyntax(winid)
   if has("nvim")
     if has("nvim-0.9.0")
       let exec_cmd = [
-            \ "hi markdownCode cterm=underline gui=underline",
+            \ 'syntax region markdownRule matchgroup=Conceal start=/\%(``\)\@!`/ matchgroup=Conceal end=/\%(``\)\@!`/ concealends',
+            \ "hi markdownRule cterm=underline gui=underline",
             \ ]
     else
       let exec_cmd = [