Holding a feather: from Han Feizi's "Talking about the Forest": "A bird with a feather bends its tail, and if it wants to drink in the river, it will overturn, so it drinks it with a feather." Use it as a guide to help each other. Bullets: Crickets' chirping.
The eighth poem of Wei's "Yong Huai": "The return air blows the four walls, and the cold birds depend on each other. Zhou Zhou is still a feather and he is hungry. "