The requirements for canceling orders in call auction stage are as follows:

9: 15-9: 20, allowing withdrawal; During 9: 20-9: 25, it is not allowed to withdraw the bill;

For the cancelled bills returned by the Shanghai Stock Exchange, the Shenzhen Stock Exchange entrusts the cancelled bills in the entrustment queue and handles them when bidding continues;

During the closing period of call auction 14: 57- 15: 00, it is not allowed to cancel the bill.