Reverse repurchase of government bonds means that investors sell government bonds to futures companies, banks and other institutions, and at the same time sign an agreement with each other to buy back these government bonds within a specified time in the future. In this process, investors will get funds to sell government bonds, and futures companies or banks will pay certain repurchase interest. The charging part usually refers to the handling fee of reverse repurchase of government bonds, not interest. Generally speaking, the handling fee is charged at the time of transaction settlement. The specific charging method and time can be different according to the regulations of exchanges and institutions. It is suggested that you carefully read the relevant contracts and terms when conducting reverse repurchase transactions of government bonds to understand the specific charges.