







羽毛未丰 is a Chinese idiom (chengyu) meaning “Still young and inexperienced”. Not yet fully fledged or developed in capability and strength. Literally, “Feathers not yet fully grown”.
The idiom "羽毛未丰" (yǔ máo wèi fēng), meaning "feathers not yet fully grown," originates from "Strategies of the Warring States: Strategies of Qin 1."
The King of Qin once said, "I have heard that a bird with incomplete feathers cannot fly high."