Two dragon boats won the championship. What does it mean for the Three Gorges to leave the lake?

After the completion of the Three Gorges Dam, the river water in the upper reaches of the Yangtze River and the river water intercepted by the Three Gorges Dam converge to form a huge lake.

"When the two dragon boats win the championship, the Three Gorges 10% will leave Pinghu" means that after the completion of the Three Gorges Dam, the river water in the upper reaches of the Yangtze River and the river water intercepted by the Three Gorges Dam will gather together to form a vast lake. This shows that the construction of the Three Gorges Dam has changed the flow direction and hydrological conditions of the Yangtze River and formed new lakes and landscapes. At the same time, it also reflects the strength and achievements of China in water conservancy projects.