Chutangque, an idiom in China, is pronounced chǔ táng yàn què, which means to live a stable life and lose vigilance. It also means that you don't know when disaster will come. From the Spring and Autumn Annals of Lu Family written by Buwei in the Warring States Period: "Swallows live in one house, and mother and son eat each other. It is warm and happy, and they think they are safe. When the stove suddenly broke down, the building burned down and the color of the birds remained the same. I don't know what will happen. " .
Idiom story
At the end of the Warring States Period, Qin attacked Zhao, but Guo Si, a close neighbor of Zhao, thought it was for the good of Wei, but she didn't think so. He thinks that Qin is strong and aggressive, and Wei can't live an easy life like a sparrow under the beam, because the house is on fire and the sparrow has no place to live.