be as cruel as a wolf
Wolf heart and dog lung, a Chinese idiom, Pinyin is l á NGX ī ng ǒ UF è I, which means to describe the heart as vicious as wolf and dog. It's from xingshihengyan.
The origin of Idioms
In Ming Dynasty, Feng Menglong's "awakening the world" volume 30: "I know this thief is so ungrateful and ungrateful."
Idiom usage
You rotten son of a bitch, you want to piss me off. You've lived a happy life. The 12th chapter of China now by Li Baojia in Qing Dynasty
Chinese PinYin : láng xīn gǒu fèi
be as cruel as a wolf
Speaking of Cao Cao, Cao Cao will arrive. shuō dào cáo cāo,cáo cāo jiù dào
arranged in a crisscross pattern. zòng héng jiāo cuò