dìngxìnglǐlùn
ㄉㄧㄥˋ ㄒㄧㄥˋ ㄌㄧˇ ㄌㄨㄣˋ
Simplified 定性理论
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 定性理論 and it comes back until you know it.