jiàngéchóngfù
ㄐㄧㄢˋ ㄍㄜˊ ㄔㄨㄥˊ ㄈㄨˋ
Simplified 间隔重复
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 間隔重複 and it comes back until you know it.