The “T+0” transaction has been re-screened recently, triggering heated discussions in the market. Supporters believe that the “T+0” transaction is the inevitable development direction of the mature capital market, and it is necessary to launch it. At the same time, the sci-tech innovation board has been operating well since its launch for more than a year, and has gradually been equipped with the conditions for trial implementation of the “T+0” system. Opponents believe that the ‘T+0’ policy is to ‘encourage speculation’ and facilitate high-frequency trading, which is not in line with the long-term orientation of value investment. Especially small and medium investors with immature investment concepts may increase their losses by frequent trading. So will the Science and Technology Innovation Board take the lead in piloting “T+0” this year? What is the impact on the secondary market?