1. I will use the sentence in Zhouyi to encourage Xiaogang, who is from a poor family, to strive for self-improvement: "Heaven holds the key, and a gentleman strives for self-improvement."

2. A poem or famous saying similar to "Don't wait for leisure, young people are white-headed and empty-hearted": "Young people don't work hard, but old people are worried."

3. In order to pursue truth, many people encourage themselves with the words "The road is long and Xiu Yuan is Xi, and I will go up and down for it".

4. "If you have ambition, you will live for a hundred years. If you don't have ambition." This famous saying tells us the importance of being determined from an early age.