Sūnzidìnglǐ
ㄙㄨㄣ ˙ㄗ ㄉㄧㄥˋ ㄌㄧˇ
Simplified 孙子定理
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 孫子定理 and it comes back until you know it.