我这边使用腾讯云镜像，会碰到报错，阿里的镜像目前正常：

[Composer\Repository\RepositorySecurityException]
  The contents of https://mirrors.cloud.tencent.com/composer/p/provider-2013%2487216f389bc25a4f5d03d0cfb1a56cff043b3b3d9cb8f
  af41214c3001d51cb37.json do not match its signature. This could indicate a man-in-the-middle attack or e.g. antivirus soft
  ware corrupting files. Try running composer again and report this if you think it is a mistake.

@乔布斯隆 是的，所以才说是测试阶段

腾讯和华为云现在都还有问题，已知道的华为云已经在推进改进了