Green tongue and white tongue
It's a Chinese idiom. Pinyin is Q ī NGK ǒ UB á ISH é, which means that you don't know what to say and violate taboos.
Idiom explanation refers to the ignorance of the importance of speaking and the violation of taboos.
Chinese PinYin : qīng kǒu bái shé
Green tongue and white tongue
thick with leaves and deep-rooted. gēn shēn yè mào
More modest, less profitable. yì qiān kuī yíng
White knife in, red knife out. bái dāo zǐ jìn,hóng dāo zǐ chū
an affair that was fermented long ago. mì yún bù yǔ