In addition to interest income, investment products such as corporate bonds and government bonds of bond funds fluctuate every day. In the long run, you can hold certain positions until maturity to seek income, but bond funds also have other investment channels, such as playing new shares. Some bond funds use a small amount of funds to participate in innovation, and the general lock-up period is three months. At present, bond funds participating in innovation have reduced their face value because of the breaking of new shares, and the decline in net value is also reasonable.