国家重大水利工程，顺利贯通！

Core Viewpoint - The successful completion of the diversion tunnel for the Yellow River Guyan Water Conservancy Hub Project marks a significant milestone, laying a solid foundation for subsequent river diversion and the full-scale construction of the main project [1][3]. Group 1: Project Overview - The Yellow River Guyan Water Conservancy Hub Project is a major water conservancy project on the Yellow River, following the completion of the Xiaolangdi Water Conservancy Hub in 2001, and plays a strategic role in the river's sediment regulation system [5]. - The project is a landmark initiative for the protection and governance of the Yellow River, ensuring its long-term stability and safety [5]. Group 2: Importance of the Diversion Tunnel - The diversion tunnel serves as a critical control project, providing a safe and smooth temporary channel for the Yellow River's flow during the main dam construction, thereby creating stable dry construction conditions for the main dam and associated structures [3]. - This engineering achievement is expected to accelerate the subsequent construction phases of the project [3]. Group 3: Functions and Benefits - Once completed, the Yellow River Guyan Water Conservancy Hub will perform essential functions such as flood control, sediment reduction, water resource regulation, water supply, irrigation, and power generation [5]. - The project will also facilitate downstream water replenishment and increase external water usage in the river, contributing significantly to the overall water and sediment regulation system of the Yellow River [5].