message: Update Compile_CN.md
  miss pip
diff: @@ -132,7 +132,7 @@ export PYTHON_EXECUTABLE=/usr/bin/python3.7
  export GOPATH=$HOME/go
  export PATH=$PATH:$GOPATH/bin
  -python -m install -r python/requirements.txt
  +python -m pip install -r python/requirements.txt
  go env -w GO111MODULE=on
  go env -w GOPROXY=https://goproxy.cn,direct
  