Explanation: It means to sharpen you like a rough jade and make you successful. Mostly used in difficult and difficult conditions.

Said by: Wang Yu's desire for beautiful women in The Book of Songs is a great exhortation.

Example:

1, don't be proud of those who are generous to me, but take pleasure in those who succeed.

2, poverty and worry, Yong Cheng also.

3. The ancients said that the Red Army completed the arduous 25,000-mile Long March with this belief.