sweet jaws and bitter heart
Chinese idiom, Pinyin is Zu ǐ Ti á nx ī NK ǔ, which means to speak kindly but to have a bad heart. From a dream of Red Mansions.
The origin of Idioms
Chapter 65 of a dream of Red Mansions by Cao Xueqin in the Qing Dynasty: "he has a sweet mouth, a bitter heart, two sides, three knives, a smile on the top, a trip on the foot, a fire on the surface, a knife on the dark, all of which he has.
Idiom usage
It has a derogatory meaning. Example Bai Xue Yi Yin · Ma Tou Diao · persuading whoring: "those people are sweet hearted, you should be careful."
sweet jaws and bitter heart
fluctuate in line with market conditions - suí háng jiù shì
restrain one 's grief and accord with inevitable changes - jié āi shùn biàn