The yield of 10-year treasury bonds is an important reference index when determining the interest rate of many bond products. When considering buying a pure debt fund, you can also make a comprehensive judgment by combining the following factors:

1. Market interest rate: Market interest rate is one of the important factors affecting bond prices. If the market interest rate rises, the bond price usually falls, and vice versa. Therefore, when choosing a pure debt fund, you need to pay attention to the trend of market interest rates and choose products that suit your risk preference.

2. Scale of bond funds: The larger the scale of bond funds, the easier it is to invest and operate, and the easier it is to spread risks. But at the same time, large-scale bond funds may also bring management difficulties and cost increases. Therefore, when choosing a bond fund, you need to choose a suitable scale according to your investment objectives and risk preferences.

3. Fund Manager: The investment ability and experience of fund managers of bond funds have an important impact on the performance of the fund. Therefore, when choosing bond funds, we need to pay attention to the investment style, historical performance and management experience of fund managers.

4. Fund companies: The strength of fund companies and the information industry also have an important impact. Choosing a fund company with strength and credibility can increase the investment value and security of the fund.

To sum up, buying a pure debt fund requires comprehensive consideration of multiple factors, not just looking at the yield of 10-year government bonds. Investors can choose their own pure debt funds according to their investment objectives, risk preferences and market conditions.