vs code 中文拓展安装失败时，可以手动下载安装，下载对版本的中文包。
https://marketplace.visualstudio.com/_apis/public/gallery/publishers/MS-CEINTL/vsextensions/vscode-language-pack-zh-hans/版本号/vspackage
vs code 1.29.1 中文包：
https://marketplace.visualstudio.com/_apis/public/gallery/publishers/MS-CEINTL/vsextensions/vscode-language-pack-zh-hans/1.29.1/vspackage