$ vi ~/.cargo/config
[source.crates-io]
replace-with = "tuna"
[source.tuna]
registry = "https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git"
$ vi ~/.cargo/config
[source.crates-io]
replace-with = "tuna"
[source.tuna]
registry = "https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git"