1. Fund redemption fee: This is one of the most important ways for fund companies to make money. Public Offering of Fund companies generally charge investors a certain redemption fee according to the contract. The more frequently investors apply for redemption, the more this part of the income will be.

2. Sales service fee: This part of income is usually related to the fund's sales channels. For example, if you sell funds through banks and securities companies, you need to pay certain sales service fees to these institutions.

3. Fund management fee: this is a fixed fee accrued by the fund company on a daily basis to pay the operating costs and profits of the fund company. Management fees are usually charged according to a certain proportion of the fund's net asset value, which is one of the important sources of income for fund companies.

4. Interest income: Fund companies may also earn interest income by investing in bonds and deposits.

5. Other income: including but not limited to investment income, fair value change income, exchange income, etc. These returns are usually related to the investment strategy and market environment of fund companies.