บท 53: Chapter 53 Hurry up, Big Head!

As the first underwater passage was completed, Shuijun Lake and Huating Reservoir were finally connected, and the waters from both sides began to flow slowly through the underground channel.

The national standard classifies water quality into five grades, with Grade I being the water source quality, natural reserves, and reputed to be the best in quality, but it is very rare and almost nonexistent in human settlements;