[analysis of midday trading on May 30] A total of 23 shares rose by the daily limit of May 30 in the two markets, with a total of 7 shares and 16 shares failed to close the board, with a closure rate of 59% (excluding St shares, delisted shares and unopened new shares). In terms of individual stocks, Nvidia concept stock Jinbaize gem board 4, Hongbo share board 4, artificial intelligence + data element Jinqiao information 10-day 6 board, Taiwan Strait nuclear power 7-day 5 board with ST off hat, brain-computer interface concept stock Xinzhi Cognition 3 board, innovative medical board 3, Aipeng medical gem board 2 board, second new + water joint water board 3.