Stock index futures was an important topic after the full circulation reform at that time, but at that time, stocks were basically not fully circulated, and the Shanghai and Shenzhen 300 stock index futures were calculated on the basis of tradable shares. At that time, the enthusiasm for foreign capital inflow was high. In this context, the scale of CSI 300 is not large, and it is easy to be manipulated, resulting in market confusion. Moreover, the market was crazy at that time. If the stock index futures also skyrocketed and plummeted, it would be difficult to control the situation. Worried about this, stock index futures have never been launched. Throughout the American financial crisis, it should be the right decision to use derivatives cautiously. I think it's a distant thing, and I just want to come up with such a clue. Now that the stock market is relatively stable and the futures market is getting bigger and more mature, it's time to go public.