Group 1 - The stock price of China Shipbuilding Industry Corporation (中船汉光) closed at 19.60 yuan on July 31, down by 0.81 yuan, representing a decline of 3.97% [1] - The stock price fluctuated between 19.59 yuan and 20.22 yuan on the same day, with a trading volume of 163,600 hands and a transaction amount of 325 million yuan [1] - The company is a subsidiary of China Shipbuilding Group, primarily engaged in the research, development, production, and sales of electronic information products, covering military and civilian electronics [1] Group 2 - On July 31, the company announced that the first extraordinary general meeting of shareholders in 2025 approved several proposals, including the revision of certain articles [1] - The company elected Zhang Jianchang as the employee representative director of the fifth board of directors on the same day [1] - On that day, the net outflow of main funds was 33.95 million yuan, accounting for 0.59% of the circulating market value [1]