~/.cargo/config

[source.crates-io]
registry = "https://github.com/rust-lang/crates.io-index"
replace-with = 'ustc'
[source.ustc]
registry = "https://mirrors.ustc.edu.cn/crates.io-index"
[http]
check-revoke = false

自己存下来的,就没必要找个链接填转载了…