A = GG(A, B, C, D, X[0], 3);
        D = GG(D, A, B, C, X[4], 5);
        C = GG(C, D, A, B, X[8], 9);
        B = GG(B, C, D, A, X[12], 13);
        A = GG(A, B, C, D, X[1], 3);
        D = GG(D, A, B, C, X[5], 5);
        C = GG(C, D, A, B, X[9], 9);
        B = GG(B, C, D, A, X[13], 13);
        A = GG(A, B, C, D, X[2], 3);
        D = GG(D, A, B, C, X[6], 5);

  markdown_include_variants: null
extra:
  social:
  - icon: fontawesome/brands/github-alt
    link: https://github.com/fastapi/fastapi
  - icon: fontawesome/brands/discord
    link: https://discord.gg/VQjSZaeJmf
  - icon: fontawesome/brands/twitter
    link: https://x.com/fastapi
  - icon: fontawesome/brands/linkedin
    link: https://www.linkedin.com/company/fastapi
  - icon: fontawesome/solid/globe

    * 注意，添加的链接要放在对应区块的开头
* [翻译文档](contributing.md#_8){.internal-link target=_blank}
    * 审阅别人翻译的文档
* 添加新的文档内容
* 修复现有问题/Bug
* 添加新功能

## 加入聊天

快加入 👥 <a href="https://discord.gg/VQjSZaeJmf" class="external-link" target="_blank">Discord 聊天服务器</a> 👥 和 FastAPI 社区里的小伙伴一起哈皮吧。

/// tip | 提示