not yet.i'm so sorry.I think the original intention of its establishment is to serve the domestic users, so as to facilitate the synchronization of foreign sources, but its working method is the same as that of the composer provided by you. I installed the composer according to the tutorial provided by you, only after replacing the source through the following methods, it ran successfully!
$ composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
$ composer clear-cache
clarkwinkelmann
