On a mission to Chu he was told to use a small side gate because he was short, and replied that only an envoy to a land of dogs goes in by the dog gate. When the king of Chu showed him a thief from Qi, he answered that an orange tree south of the Huai bears oranges but north of it bears bitter fruit:
橘生淮南则为橘,
生于淮北则为枳. People are shaped by where they live.