diff --git a/.ycm_extra_conf.py b/.ycm_extra_conf.py
index eb302d68..c21d2f99 100644
--- a/.ycm_extra_conf.py
+++ b/.ycm_extra_conf.py
@@ -28,8 +28,17 @@
 #
 # For more information, please refer to <http://unlicense.org/>
 
-import os
-import ycm_core
+from sysconfig import get_path
+import platform
+import os.path as p
+import subprocess
+
+DIR_OF_THIS_SCRIPT = p.abspath( p.dirname( __file__ ) )
+DIR_OF_THIRD_PARTY = p.join( DIR_OF_THIS_SCRIPT, 'third_party' )
+DIR_OF_WATCHDOG_DEPS = p.join( DIR_OF_THIRD_PARTY, 'watchdog_deps' )
+SOURCE_EXTENSIONS = [ '.cpp', '.cxx', '.cc', '.c', '.m', '.mm' ]
+
+database = None
 
 # These are the compilation flags that will be used in case there's no
 # compilation database set (by default, one is not set).
@@ -37,27 +46,39 @@
 flags = [
 '-Wall',
 '-Wextra',
-# '-Werror',
+'-Werror',
 '-Wno-long-long',
 '-Wno-variadic-macros',
 '-fexceptions',
 '-DNDEBUG',
-# You 100% do NOT need -DUSE_CLANG_COMPLETER in your flags; only the YCM
-# source code needs it.
+# You 100% do NOT need -DUSE_CLANG_COMPLETER and/or -DYCM_EXPORT in your flags;
+# only the YCM source code needs it.
 '-DUSE_CLANG_COMPLETER',
-# THIS IS IMPORTANT! Without a "-std=<something>" flag, clang won't know which
-# language to use when compiling headers. So it will guess. Badly. So C++
-# headers will be compiled as C headers. You don't want that so ALWAYS specify
-# a "-std=<something>".
-# For a C project, you would set this to something like 'c99' instead of
-# 'c++11'.
-'-std=c++17',
-# ...and the same thing goes for the magic -x option which specifies the
-# language that the files to be compiled are written in. This is mostly
-# relevant for c++ headers.
+'-DYCM_EXPORT=',
+'-DYCM_ABSEIL_SUPPORTED',
+# THIS IS IMPORTANT! Without the '-x' flag, Clang won't know which language to
+# use when compiling headers. So it will guess. Badly. So C++ headers will be
+# compiled as C headers. You don't want that so ALWAYS specify the '-x' flag.
 # For a C project, you would set this to 'c' instead of 'c++'.
 '-x',
 'c++',
+'-std=c++17',
+
+# AArch64
+'-isystem',
+ '/usr/include/c++/11',
+'-isystem',
+ '/usr/include/aarch64-linux-gnu/c++/11',
+'-isystem',
+ '/usr/include/c++/11/backward',
+'-isystem',
+ '/usr/lib/gcc/aarch64-linux-gnu/11/include',
+'-isystem',
+ '/usr/local/include',
+'-isystem',
+ '/usr/include/aarch64-linux-gnu',
+'-isystem',
+ '/usr/include',
 
 # c/c++ include path
 '-isystem',
@@ -83,11 +104,7 @@
 '-isystem',
 '/usr/include/c++/10.2.0',
 '-isystem',
-'/usr/include',
-'-isystem',
 '/usr/include/x86_64-linux-gnu',
-'-isystem',
-'/usr/local/include',
 
 # Termux
 '-isystem',
@@ -98,7 +115,6 @@
 '/data/data/com.termux/files/usr/include/c++/v1/experimental',
 ]
 
-
 # Set this to the absolute path to the folder (NOT the file!) containing the
 # compile_commands.json file to use that instead of 'flags'. See here for
 # more details: http://clang.llvm.org/docs/JSONCompilationDatabase.html
@@ -111,64 +127,120 @@
 # 'flags' list of compilation flags. Notice that YCM itself uses that approach.
 compilation_database_folder = ''
 
-if os.path.exists( compilation_database_folder ):
-  database = ycm_core.CompilationDatabase( compilation_database_folder )
-else:
-  database = None
-
-SOURCE_EXTENSIONS = [ '.cpp', '.cxx', '.cc', '.c', '.m', '.mm' ]
-
-def DirectoryOfThisScript():
-  return os.path.dirname( os.path.abspath( __file__ ) )
-
 
 def IsHeaderFile( filename ):
-  extension = os.path.splitext( filename )[ 1 ]
+  extension = p.splitext( filename )[ 1 ]
   return extension in [ '.h', '.hxx', '.hpp', '.hh' ]
 
 
-def GetCompilationInfoForFile( filename ):
-  # The compilation_commands.json file generated by CMake does not have entries
-  # for header files. So we do our best by asking the db for flags for a
-  # corresponding source file, if any. If one exists, the flags for that file
-  # should be good enough.
+def FindCorrespondingSourceFile( filename ):
   if IsHeaderFile( filename ):
-    basename = os.path.splitext( filename )[ 0 ]
+    basename = p.splitext( filename )[ 0 ]
     for extension in SOURCE_EXTENSIONS:
       replacement_file = basename + extension
-      if os.path.exists( replacement_file ):
-        compilation_info = database.GetCompilationInfoForFile(
-          replacement_file )
-        if compilation_info.compiler_flags_:
-          return compilation_info
+      if p.exists( replacement_file ):
+        return replacement_file
+  return filename
+
+
+def PathToPythonUsedDuringBuild():
+  try:
+    filepath = p.join( DIR_OF_THIS_SCRIPT, 'PYTHON_USED_DURING_BUILDING' )
+    with open( filepath ) as f:
+      return f.read().strip()
+  except OSError:
     return None
-  return database.GetCompilationInfoForFile( filename )
 
 
-def FlagsForFile( filename, **kwargs ):
-  if not database:
+def Settings( **kwargs ):
+  # Do NOT import ycm_core at module scope.
+  import ycm_core
+
+  global database
+  if database is None and p.exists( compilation_database_folder ):
+    database = ycm_core.CompilationDatabase( compilation_database_folder )
+
+  language = kwargs[ 'language' ]
+
+  if language == 'cfamily':
+    # If the file is a header, try to find the corresponding source file and
+    # retrieve its flags from the compilation database if using one. This is
+    # necessary since compilation databases don't have entries for header files.
+    # In addition, use this source file as the translation unit. This makes it
+    # possible to jump from a declaration in the header file to its definition
+    # in the corresponding source file.
+    filename = FindCorrespondingSourceFile( kwargs[ 'filename' ] )
+
+    if not database:
+      return {
+        'flags': flags,
+        'include_paths_relative_to_dir': DIR_OF_THIS_SCRIPT,
+        'override_filename': filename
+      }
+
+    compilation_info = database.GetCompilationInfoForFile( filename )
+    if not compilation_info.compiler_flags_:
+      return {}
+
+    # Bear in mind that compilation_info.compiler_flags_ does NOT return a
+    # python list, but a "list-like" StringVec object.
+    final_flags = list( compilation_info.compiler_flags_ )
+
+    # NOTE: This is just for YouCompleteMe; it's highly likely that your project
+    # does NOT need to remove the stdlib flag. DO NOT USE THIS IN YOUR
+    # ycm_extra_conf IF YOU'RE NOT 100% SURE YOU NEED IT.
+    try:
+      final_flags.remove( '-stdlib=libc++' )
+    except ValueError:
+      pass
+
     return {
-      'flags': flags,
-      'include_paths_relative_to_dir': DirectoryOfThisScript()
+      'flags': final_flags,
+      'include_paths_relative_to_dir': compilation_info.compiler_working_dir_,
+      'override_filename': filename
     }
 
-  compilation_info = GetCompilationInfoForFile( filename )
-  if not compilation_info:
-    return None
+  if language == 'python':
+    return {
+      'interpreter_path': PathToPythonUsedDuringBuild(),
+      'ls': {
+        'python': {
+          'analysis': {
+            'extraPaths': [
+              p.join( DIR_OF_THIS_SCRIPT ),
+              p.join( DIR_OF_THIRD_PARTY, 'bottle' ),
+              p.join( DIR_OF_THIRD_PARTY, 'regex-build' ),
+              p.join( DIR_OF_THIRD_PARTY, 'frozendict' ),
+              p.join( DIR_OF_THIRD_PARTY, 'jedi_deps', 'jedi' ),
+              p.join( DIR_OF_THIRD_PARTY, 'jedi_deps', 'parso' ),
+              p.join( DIR_OF_WATCHDOG_DEPS, 'watchdog', 'build', 'lib3' ),
+              p.join( DIR_OF_WATCHDOG_DEPS, 'pathtools' ),
+              p.join( DIR_OF_THIRD_PARTY, 'waitress' )
+            ],
+            'useLibraryCodeForTypes': True
+          }
+        }
+      }
+    }
 
-  # Bear in mind that compilation_info.compiler_flags_ does NOT return a
-  # python list, but a "list-like" StringVec object.
-  final_flags = list( compilation_info.compiler_flags_ )
+  return {}
 
-  # NOTE: This is just for YouCompleteMe; it's highly likely that your project
-  # does NOT need to remove the stdlib flag. DO NOT USE THIS IN YOUR
-  # ycm_extra_conf IF YOU'RE NOT 100% SURE YOU NEED IT.
-  try:
-    final_flags.remove( '-stdlib=libc++' )
-  except ValueError:
-    pass
-
-  return {
-    'flags': final_flags,
-    'include_paths_relative_to_dir': compilation_info.compiler_working_dir_
-  }
+
+def PythonSysPath( **kwargs ):
+  sys_path = kwargs[ 'sys_path' ]
+
+  sys_path[ 0:0 ] = [ p.join( DIR_OF_THIS_SCRIPT ),
+                      p.join( DIR_OF_THIRD_PARTY, 'bottle' ),
+                      p.join( DIR_OF_THIRD_PARTY, 'regex-build' ),
+                      p.join( DIR_OF_THIRD_PARTY, 'frozendict' ),
+                      p.join( DIR_OF_THIRD_PARTY, 'jedi_deps', 'jedi' ),
+                      p.join( DIR_OF_THIRD_PARTY, 'jedi_deps', 'parso' ),
+                      p.join( DIR_OF_WATCHDOG_DEPS,
+                              'watchdog',
+                              'build',
+                              'lib3' ),
+                      p.join( DIR_OF_WATCHDOG_DEPS, 'pathtools' ),
+                      p.join( DIR_OF_THIRD_PARTY, 'waitress' ) ]
+
+  sys_path.append( p.join( DIR_OF_THIRD_PARTY, 'jedi_deps', 'numpydoc' ) )
+  return sys_path
diff --git a/install.sh b/install.sh
index eb202560..2ef5201d 100755
--- a/install.sh
+++ b/install.sh
@@ -174,74 +174,28 @@ function is_macos1014()
     fi
 }
 
-# 在alpine上直装vim8.2
+# 在alpine上直装vim
 # function compile_vim_on_alpine()
 # {
 #     apk --upgrade add vim
 #     cd -
 # }
 
-# 在ubuntu上源代码安装vim
-function compile_vim_on_ubuntu()
+# 在ubuntu系上源代码安装vim
+function compile_vim_on_ubuntu_like()
 {
-    sudo apt-get install -y libncurses5-dev libncurses5 libgnome2-dev libgnomeui-dev \
-        libgtk2.0-dev libatk1.0-dev libbonoboui2-dev \
-        libcairo2-dev libx11-dev libxpm-dev libxt-dev python-dev python3-dev ruby-dev lua5.1 lua5.1-dev
+    sudo apt-get install -y libncurses-dev libncurses6 libgtk-3-dev libatk1.0-dev libcairo2-dev libx11-dev libxpm-dev libxt-dev python3-dev ruby-dev libperl-dev lua5.4 liblua5.4-dev
 
-    rm -rf ~/vim82
-    git clone https://gitee.com/chxuan/vim82.git ~/vim82
-    cd ~/vim82
+    rm -rf ~/vim-src
+    git clone https://github.com/vim/vim.git ~/vim-src
+    cd ~/vim-src
     ./configure --with-features=huge \
         --enable-multibyte \
         --enable-rubyinterp \
-        --enable-pythoninterp \
+        --enable-python3interp \
         --enable-perlinterp \
         --enable-luainterp \
-        --enable-gui=gtk2 \
-        --enable-cscope \
-        --prefix=/usr
-    make
-    sudo make install
-    cd -
-}
-
-# 在debian上源代码安装vim
-function compile_vim_on_debian()
-{
-    sudo apt-get install -y libncurses5-dev libncurses5 libgtk2.0-dev libatk1.0-dev libcairo2-dev libx11-dev libxpm-dev libxt-dev python-dev python3-dev ruby-dev lua5.1 lua5.1-dev
-
-    rm -rf ~/vim82
-    git clone https://gitee.com/chxuan/vim82.git ~/vim82
-    cd ~/vim82
-    ./configure --with-features=huge \
-        --enable-multibyte \
-        --enable-rubyinterp \
-        --enable-pythoninterp \
-        --enable-perlinterp \
-        --enable-luainterp \
-        --enable-gui=gtk2 \
-        --enable-cscope \
-        --prefix=/usr
-    make
-    sudo make install
-    cd -
-}
-
-# 在parrot上源代码安装vim
-function compile_vim_on_parrot()
-{
-    sudo apt-get install -y libncurses5-dev libncurses5 libgtk2.0-dev libatk1.0-dev libcairo2-dev libx11-dev libxpm-dev libxt-dev python-dev python3-dev ruby-dev lua5.1 vim
-
-    rm -rf ~/vim82
-    git clone https://gitee.com/chxuan/vim82.git ~/vim82
-    cd ~/vim82
-    ./configure --with-features=huge \
-        --enable-multibyte \
-        --enable-rubyinterp \
-        --enable-pythoninterp \
-        --enable-perlinterp \
-        --enable-luainterp \
-        --enable-gui=gtk2 \
+        --enable-gui=gtk3 \
         --enable-cscope \
         --prefix=/usr
     make
@@ -253,20 +207,20 @@ function compile_vim_on_parrot()
 function compile_vim_on_centos()
 {
     sudo yum install -y ruby ruby-devel lua lua-devel luajit \
-        luajit-devel ctags git python python-devel \
+        luajit-devel ctags git \
         python34 python34-devel tcl-devel \
         perl perl-devel perl-ExtUtils-ParseXS \
         perl-ExtUtils-XSpp perl-ExtUtils-CBuilder \
         perl-ExtUtils-Embed libX11-devel ncurses-devel
     
-    rm -rf ~/vim82
-    git clone https://gitee.com/chxuan/vim82.git ~/vim82
-    cd ~/vim82
+    rm -rf ~/vim-src
+    git clone https://github.com/vim/vim.git ~/vim-src
+    cd ~/vim-src
     ./configure --with-features=huge \
         --enable-multibyte \
         --with-tlib=tinfo \
         --enable-rubyinterp=yes \
-        --enable-pythoninterp=yes \
+        --enable-python3interp=yes \
         --enable-perlinterp=yes \
         --enable-luainterp=yes \
         --enable-gui=gtk2 \
@@ -282,7 +236,7 @@ function install_prepare_software_on_mac()
 {
     xcode-select --install
 
-    brew install vim gcc cmake ctags-exuberant ack
+    brew install vim gcc cmake universal-ctags ack
 
     macos1014=$(is_macos1014)
     if [ $macos1014 == 1 ]; then
@@ -300,7 +254,7 @@ function install_prepare_software_on_freebsd()
 function install_prepare_software_on_android()
 {
     pkg update
-    pkg install -y git vim-python cmake python2 python ctags ack-grep ncurses-utils
+    pkg install -y git vim-python cmake python ctags ack-grep ncurses-utils
 }
 
 # 安装alpine必备软件 需要更换源
@@ -319,21 +273,13 @@ function install_prepare_software_on_alpine()
 function install_prepare_software_on_ubuntu()
 {
     sudo apt-get update
-
-    version=$(get_ubuntu_version)
-    if [ $version -eq 14 ];then
-        sudo apt-get install -y cmake3
-    else
-        sudo apt-get install -y cmake
-    fi
-
-    sudo apt-get install -y build-essential python python-dev python3-dev fontconfig libfile-next-perl ack-grep git
-    sudo apt-get install -y universal-ctags || sudo apt-get install -y exuberant-ctags
+    sudo apt-get install -y build-essential cmake python3-dev fontconfig libfile-next-perl ack git universal-ctags
     
-    if [ $version -ge 18 ];then
+    version=$(get_ubuntu_version)
+    if [ $version -ge 24 ];then
         sudo apt-get install -y vim
     else
-        compile_vim_on_ubuntu
+        compile_vim_on_ubuntu_like
     fi
 }
 
@@ -341,26 +287,8 @@ function install_prepare_software_on_ubuntu()
 function install_prepare_software_on_ubuntu_like()
 {
     sudo apt-get update
-    sudo apt-get install -y cmake build-essential python python-dev python3-dev fontconfig libfile-next-perl ack-grep git
-    sudo apt-get install -y universal-ctags || sudo apt-get install -y exuberant-ctags
-    compile_vim_on_ubuntu
-}
-
-# 安装debian必备软件
-function install_prepare_software_on_debian()
-{
-    sudo apt-get update
-    sudo apt-get install -y cmake build-essential python python-dev python3-dev fontconfig libfile-next-perl ack git
-    sudo apt-get install -y universal-ctags || sudo apt-get install -y exuberant-ctags
-    compile_vim_on_debian
-}
-
-# 安装parrot必备软件
-function install_prepare_software_on_parrot()
-{
-    sudo apt-get update
-    sudo apt-get install -y cmake exuberant-ctags build-essential python python-dev python3-dev fontconfig libfile-next-perl ack git
-    compile_vim_on_parrot
+    sudo apt-get install -y build-essential cmake python3-dev fontconfig libfile-next-perl ack git universal-ctags
+    compile_vim_on_ubuntu_like
 }
 
 # 安装centos必备软件
@@ -369,9 +297,9 @@ function install_prepare_software_on_centos()
     version=$(get_centos_version)
     if [ $version -ge 8 ];then
         sudo dnf install -y epel-release
-        sudo dnf install -y vim ctags automake gcc gcc-c++ kernel-devel make cmake python2 python2-devel python3-devel fontconfig ack git
+        sudo dnf install -y vim ctags automake gcc gcc-c++ kernel-devel make cmake python3 python3-devel fontconfig ack git
     else
-        sudo yum install -y ctags automake gcc gcc-c++ kernel-devel cmake python-devel python3-devel fontconfig ack git
+        sudo yum install -y ctags automake gcc gcc-c++ kernel-devel cmake python3-devel fontconfig ack git
         compile_vim_on_centos
     fi
 }
@@ -379,13 +307,13 @@ function install_prepare_software_on_centos()
 # 安装fedora必备软件
 function install_prepare_software_on_fedora()
 {
-    sudo dnf install -y vim ctags automake gcc gcc-c++ kernel-devel cmake python-devel python3-devel fontconfig ack git
+    sudo dnf install -y vim ctags automake gcc gcc-c++ kernel-devel cmake python3-devel fontconfig ack git
 }
 
 # 安装archlinux必备软件
 function install_prepare_software_on_archlinux()
 {
-    sudo pacman -S --noconfirm vim ctags automake gcc cmake python3 python2 ack git fontconfig
+    sudo pacman -S --noconfirm vim ctags automake gcc cmake python3 ack git fontconfig
     sudo ln -s /usr/lib/libtinfo.so.6 /usr/lib/libtinfo.so.5
 }
 
@@ -420,7 +348,7 @@ function install_software_on_gentoo()
 # 安装opensuse必备软件
 function install_prepare_software_on_opensuse()
 {
-    sudo zypper install -y vim ctags gcc gcc-c++ cmake python-devel python3-devel ack fontconfig git ncurses5-devel
+    sudo zypper install -y vim ctags gcc gcc-c++ cmake python3-devel ack fontconfig git ncurses5-devel
 }
 
 # 拷贝文件
@@ -487,45 +415,22 @@ function install_vim_plugin()
 # 安装ycm插件
 function install_ycm()
 {
-    git clone https://gitee.com/chxuan/YouCompleteMe-clang.git ~/.vim/plugged/YouCompleteMe
+    git clone --recurse-submodules https://github.com/ycm-core/YouCompleteMe.git ~/.vim/plugged/YouCompleteMe
 
     cd ~/.vim/plugged/YouCompleteMe
     distro=`get_linux_distro`
-    read -p "Please choose to compile ycm with python2 or python3, if there is a problem with the current selection, please choose another one. [2/3] " version
-    if [[ $version == "2" ]]; then
-        echo "Compile ycm with python2."
-        # alpine 忽略 --clang-completer 并将 let g:ycm_clangd_binary_path 注入 .vimrc
-        {
-            if [ ${distro} == "Alpine" ]; then
-                echo "##########################################"
-                echo "Apline Build, need without GLIBC."
-                echo "##########################################"
-                sed -i "273ilet g:ycm_clangd_binary_path='/usr/bin/clang'" ~/.vimrc
-                python2.7 ./install.py
-                return
-            fi
-        } || {
-            python2.7 ./install.py --clang-completer
-        } || {
-            echo "##########################################"
-            echo "Build error, trying rebuild without Clang."
-            echo "##########################################"
-            python2.7 ./install.py
-        }
+    echo "Compile ycm with python3."
+    # alpine 忽略 --clang-completer 并将 let g:ycm_clangd_binary_path 注入 .vimrc
+    if [ ${distro} == "Alpine" ]; then
+        echo "##########################################"
+        echo "Alpine Build, need without GLIBC."
+        echo "##########################################"
+        sed -i "273ilet g:ycm_clangd_binary_path='/usr/bin/clang'" ~/.vimrc
+        python3 ./install.py
+        return
     else
-        echo "Compile ycm with python3."
         {
-            # alpine 跳过该步骤
-            if [ ${distro} == "Alpine" ]; then
-                echo "##########################################"
-                echo "Apline Build, need without GLIBC."
-                echo "##########################################"
-                sed -i "273ilet g:ycm_clangd_binary_path='/usr/bin/clang'" ~/.vimrc
-                python3 ./install.py
-                return
-            fi
-        } || {
-            python3 ./install.py --clang-completer
+            python3 ./install.py --clangd-completer
         } || {
             echo "##########################################"
             echo "Build error, trying rebuild without Clang."
@@ -538,18 +443,12 @@ function install_ycm()
 # 在android上安装ycm插件
 function install_ycm_on_android()
 {
-    git clone https://gitee.com/chxuan/YouCompleteMe-clang.git ~/.vim/plugged/YouCompleteMe
+    git clone --recurse-submodules https://github.com/ycm-core/YouCompleteMe.git ~/.vim/plugged/YouCompleteMe
 
     cd ~/.vim/plugged/YouCompleteMe
 
-    read -p "Please choose to compile ycm with python2 or python3, if there is a problem with the current selection, please choose another one. [2/3] " version
-    if [[ $version == "2" ]]; then
-        echo "Compile ycm with python2."
-        python2.7 ./install.py --clang-completer --system-libclang
-    else
-        echo "Compile ycm with python3."
-        python3 ./install.py --clang-completer --system-libclang
-    fi
+    echo "Compile ycm with python3."
+    python3 ./install.py --clangd-completer --system-libclang
 }
 
 # 打印logo
@@ -630,22 +529,6 @@ function install_vimplus_on_ubuntu_like()
     begin_install_vimplus
 }
 
-# 在debian上安装vimplus
-function install_vimplus_on_debian()
-{
-    backup_vimrc_and_vim
-    install_prepare_software_on_debian
-    begin_install_vimplus
-}
-
-# 在parrot上安装vimplus
-function install_vimplus_on_parrot()
-{
-    backup_vimrc_and_vim
-    install_prepare_software_on_parrot
-    begin_install_vimplus
-}
-
 # 在centos上安装vimplus
 function install_vimplus_on_centos()
 {
@@ -712,15 +595,15 @@ function install_vimplus_on_linux()
     elif [ ${distro} == "elementaryOS" ]; then
         install_vimplus_on_ubuntu_like
     elif [ ${distro} == "Debian" ]; then
-        install_vimplus_on_debian
+        install_vimplus_on_ubuntu_like
     elif [ ${distro} == "Raspbian" ]; then
-        install_vimplus_on_debian
+        install_vimplus_on_ubuntu_like
     elif [ ${distro} == "UOS" ]; then
-        install_vimplus_on_debian
+        install_vimplus_on_ubuntu_like
     elif [ ${distro} == "Kali" ]; then
-        install_vimplus_on_debian
+        install_vimplus_on_ubuntu_like
     elif [ ${distro} == "Parrot" ]; then
-        install_vimplus_on_parrot
+        install_vimplus_on_ubuntu_like
     elif [ ${distro} == "CentOS" ]; then
         install_vimplus_on_centos
     elif [ ${distro} == "fedora" ]; then