What does it mean to hold Jin Huaiyu? Source?

Huai Jin holds jade from "Nine Chapters of Chu Ci Huai Sha": "I don't know what is the difference between holding jade." The implication is that I have the same moral character as Meiyu, but no one can appreciate me, so that my talents can be fully displayed. Yu in Bao Puzi vividly compares people's pure and beautiful moral quality. As subject and predicate; Use praise to describe a person's noble character.