好久咩用yarn了，今天用了就报：
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
error An unexpected error occurred: "https://registry.yarnpkg.com/@element-plus%2ficons-vue: connect ETIMEDOUT 104.16.23.35:443".
看问题是资源链接不上，然后检查npm设置：
#npm config list
发现不是taobao的，果断修改：
npm config set registry https://registry.npm.taobao.org
npm config set disturl https://npm.taobao.org/dist
再运行：
yarn run install
好，很棒，很优秀，已经完全可以了，加油！！！