一度触发临停！301638，大涨逾30%

Group 1 - The company, Southern Power Grid Digital Grid Research Institute Co., Ltd., officially listed on the Shenzhen Stock Exchange on November 18, with an opening increase of 261.51% on its first trading day [1] - By the end of the trading day, the stock's increase settled at 224.78% [1] - On November 19, the newly listed stock experienced a surge of over 30% in the afternoon session, with the stock triggering a trading halt during the morning session [2]