Jiānníxìshù
ㄐㄧㄢ ㄋㄧˊ ㄒㄧˋ ㄕㄨˋ
Simplified 坚尼系数
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 堅尼係數 and it comes back until you know it.