鸿日达：证券事务代表丁艳辞职

Group 1 - The core point of the article highlights that Hongrida announced the resignation of Ms. Ding Yan as the company's securities affairs representative due to personal reasons, and she will no longer hold any position within the company after her resignation [1] Group 2 - In February, China's AI usage surpassed that of the United States for the first time, with four major models ranking among the top five globally, indicating a significant increase in domestic computing power demand [1]