The reasons why the No. 1 fund has increased a lot are as follows:

1. The fund manager has strong management capabilities and can seize investment opportunities in the market to increase the fund's income.

2. The fund’s investment strategy is in line with market trends and provides higher returns.

3. The fund has a higher position and gets more income.

4. The fund’s investment varieties are relatively single and can obtain higher returns.

5. The fund’s investment varieties are relatively diversified to reduce risks.