The reason why there is no official document number for abnormal transactions is that there are omissions in official documents, and it is necessary to apply to the department for reissue.

Criteria for identifying abnormal trading behavior:

1. Self-trading behavior: customers trade more than 5 times a day (including this number, the same below).

2. Frequent cancellation of orders: customers cancel more than 500 contracts in a single day, but orders that are automatically cancelled due to arbitrage orders coming from the system are not counted. If the customer cancels more than 500 contract orders in a single day, it will be regarded as one time.

3. Large withdrawal: customers withdraw more than 500 bills per contract in a single day, and the number of withdrawals exceeds 10. If the customer cancels more than 500 contracts in a single day and the number of cancellations exceeds 10, it will be regarded as one time.

4. Overlimit behavior of consolidated positions of related accounts: A group of customers have obvious related relationships in terms of ownership structure, transaction executor and transaction consistency, and the exchange can identify them as related accounts. Consolidated calculation of related account positions. The comprehensive position has reached above the position limit of exchange customers.