Group 1 - The core point of the article is that Huakang Clean (301235.SZ) announced that its chairman, Tan Pingtao, is under investigation by the Guangdong Provincial Supervisory Committee, and the company's daily operations will be managed by the executive team during this period [2] - The company reported a turnaround in performance for the first half of the year, achieving a revenue of 835 million yuan, a year-on-year increase of 50.73%, and a net profit of 18.68 million yuan, indicating a return to profitability [2] - Despite the positive revenue growth, the net cash flow from operating activities was negative at -294 million yuan, a decline of 74.03% year-on-year [2] Group 2 - Huakang Clean's main business includes the research, design, implementation, and operation of cleanroom purification systems, as well as the sale of related medical equipment and consumables [2] - As of June 30, the company had a total order backlog of 3.827 billion yuan, primarily from purification integration business, with medical special orders amounting to 2.537 billion yuan, laboratory orders at 774 million yuan, and electronic cleanroom orders at 121 million yuan [2] - As of August 13, Huakang Clean's stock price closed at 32.27 yuan per share, with a total market capitalization of 3.48 billion yuan [3]