The fuse mechanism is to suspend trading when the index rises or falls to a certain extent. Based on the Shanghai and Shenzhen 300 Index. When the price rises or falls by 5%, trading will be suspended for 15 minutes, and trading will continue after call auction. If the price rises or falls by 5% after 14: 45, or rises or falls by 7% at any time throughout the day, trading will be suspended until the market closes. Exponential fuse mechanism will be implemented after 20 16 New Year's Day.