1. Determine the index circuit breaker time in batches. When the 5% circuit breaker threshold is triggered, trading will be suspended for 30 minutes. When the circuit breaker ends, a call auction will be conducted, and then trading will continue on the same day. If the 5% circuit breaker threshold is triggered at 14:30 and after, and the 7% circuit breaker threshold is triggered at any time throughout the day, trading will be suspended until the market closes. If the circuit breaker closes at 15:00 and trading is not resumed, the closing price of the relevant security will be the volume-weighted average price of all transactions one minute before the last transaction of the security on that day (including the last transaction). The closing price of the option contract will still be based on Implementation of relevant rules.

2. Arrangements for special periods. First, the circuit breaker will not be implemented during the opening call auction; if the opening index point has triggered the 5% threshold, the circuit breaker will be implemented at 9:30 and trading will be suspended for 30 minutes; if the opening index point has triggered the 7% threshold, the circuit breaker will be implemented at 9:30 The circuit breaker will be implemented at :30 and trading will be suspended until the market closes. Second, if the circuit breaker duration is insufficient in the morning, it will be made up after the market opens in the afternoon. The lunch break time will not be included in the circuit breaker duration to facilitate investors to adjust their declarations. Third, the circuit breaker mechanism is effective throughout the day. Considering that the domestic A-share market is prone to irrational and large fluctuations in the late market stage, A-share circuit breakers are still implemented during the late market stage. Fourth, the circuit breaker is only implemented in the morning on the stock index futures delivery day. Regardless of the trading suspension caused by hitting 5% or 7%, trading will be resumed in the afternoon, so that the stock index futures can calculate the delivery settlement price and deliver smoothly.