1. national debt fund: the national debt fund mainly invests in state bonds and state-owned bank bonds publicly issued by central and local government departments. This kind of fund has low risk, but its income level is relatively low.

2. Corporate bond funds: Corporate bond funds mainly invest in bonds publicly issued by enterprises. This kind of fund has great profit potential, but the risk is relatively high.

3. Convertible bond fund: Convertible bond fund mainly invests in convertible bonds, which has the two-way characteristics of stocks and bonds.

4. Local government bond funds: Local government bond funds mainly invest in bonds issued by local governments. This kind of fund has high liquidity and low risk.

5. Public debt funds: Public debt funds raise funds from the public and circulate and sell them on the stock exchange. Such funds are highly transparent.

6. Private debt fund: Private debt fund is open to designated investors and does not raise funds from the public. The entry threshold is high and the transparency is relatively low.

7. Short-term debt funds: Short-term debt funds mainly invest in short-term bonds. Such funds have low risks and relatively low returns.

8. Medium-term debt fund: Medium-term debt fund refers to bonds with a maturity of 25 years. The return on investment and risk level of such funds are relatively moderate.

9. Long-term debt funds: Long-term debt funds refer to bonds with an investment period of more than 5 years. This kind of fund has great profit potential, but the risk is relatively high.

What is a bond fund?

Bond fund, also known as bond fund, is a kind of fund product that specializes in investing in bonds. It concentrates investors' funds and makes diversified investments in order to seek relatively stable profits. In China market, the main investment targets of bond funds usually include government bonds, financial bonds and corporate bonds.

As a fixed income tool, bonds usually repay the principal and interest on time, which brings relatively stable investment income to investors. Compared with stock funds, bond funds are less risky. Therefore, bond funds have the characteristics of relatively stable income and low risk.

For investors who pursue relatively stable returns and have low risk tolerance, bond funds are a suitable choice. By investing in bond funds, investors can spread risks and enjoy fixed income. At the same time, bond funds can also play a role in balancing risks in the portfolio and provide a certain hedging function.