1, ask the sheep to know the horse, an idiom in China, with the pinyin of wè nyanzhh: m ─, which means to infer from the side and find out the truth. From Zhao Hanguang's Han Biography.

2. Idiom origin: The Biography of Zhao Hanguang by Ban Gu in the Eastern Han Dynasty: "If you want to know the vest, ask the dog, the sheep, the cow and then the horse."