慧翰股份：聘任张文斌担任公司董事会秘书

Group 1 - The board of Huihan Microelectronics announced the resignation of Ms. Feng Jing as the company’s board secretary due to work adjustments, effective February 27 [1] - Ms. Feng will continue to serve as a director and deputy general manager after her resignation [1] - The company approved the appointment of Mr. Zhang Wenbin as the new board secretary, with a term lasting until the end of the fourth board session [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 [1] - The demand for domestic computing power in China is experiencing exponential growth [1]