Group 1 - The core issue involves Huang Yudong, the Deputy Secretary and General Manager of the Hanjiang Water Resources Group, who is under investigation for serious violations of discipline and law [1][2] - Huang Yudong was previously the Director of the Finance Bureau of the Yangtze River Water Resources Commission and was nominated as the General Manager of Hanjiang Water Resources and Hydropower Group in December 2023, with an official appointment set for January 2024 [2] - The Hanjiang Group is a large enterprise group consisting of 24 member companies, focusing on the management of the Danjiangkou Water Conservancy Project, which is crucial for flood control, water supply, and is part of the South-to-North Water Diversion Project [2]