1. After the CSRC announced the adjustment and optimization of the relevant securities lending system, the Exchange issued a notice to plug the loophole of risk-free arbitrage with securities lending after issuance. Therefore, the fixed margin arbitrage is no longer legal.

2. This model is called "hand-in-hand transaction" in the market, and the major shareholders of the supplier are naturally very happy. The stocks held in the hands will not be easily sold. If they can still get extra income, why not?