Group 1 - The stock price of Huahai Pharmaceutical closed at 22.72 yuan on July 30, down 1.43% from the previous trading day [1] - The stock reached a high of 24.24 yuan and a low of 22.55 yuan during the day, with a volatility of 7.33% [1] - The trading volume was 606,356 hands, with a total transaction amount of 1.406 billion yuan [1] Group 2 - Huahai Pharmaceutical operates in the chemical pharmaceutical industry, covering the research, production, and sales of active pharmaceutical ingredients and formulations [1] - The company is based in Zhejiang and its products are involved in cardiovascular, psychiatric, and antiviral fields [1] - During the early trading session on July 30, the stock experienced a rapid rebound, with price fluctuations exceeding 2% within five minutes [1] Group 3 - The main funds showed a slight net inflow on that day [1]