Group 1 - The stock price of Huatai Medical closed at 279.59 yuan on August 1, representing a decline of 1.74% compared to the previous trading day [1] - The trading volume on that day was 2.26 billion yuan, with a total of 8024 hands traded and a price fluctuation of 2.65% [1] - The company is focused on the research, development, production, and sales of cardiovascular interventional and electrophysiological medical devices, covering three main areas: coronary intervention, peripheral intervention, and electrophysiology [1] Group 2 - On August 1, the net inflow of main funds was 8.29 million yuan, with a cumulative net inflow of 53.31 million yuan over the past five days [1]