Crocodiles eat turtles.

Six parents denied it. When crocodiles eat turtles, they don't even let their relatives go, and they are merciless. So use this two-part allegorical saying to describe a person who is heartless and doesn't care about his relatives. Two-part allegorical saying is a unique form in China folk language and culture, which consists of two sentences. The first sentence is an ordinary sentence, and the second sentence is a clever homonym or antonym, which aims to arouse the listener's thinking and entertainment.