According to the announcement of Zhengshang Institute, China Securities Regulatory Commission has approved the registration of caustic soda futures on Zhengzhou Commodity Exchange, and the listing and trading time will be from September 15, 2023. On the day of listing, call auction time is 8: 55-9: 00 am, and trading hours are 9: 00-1:30 and 13: 30- 15: 00. Night trading began on the night of September 15, and the night trading time was 2 1: 00-23: 00.