No steel or concrete, yet it tames the floods. No electricity, yet it has irrigated vast stretches of farmland for more than 1,500 years. With a graceful arc that tames the waters, an ingenious hydraulic system that works with nature, and rules inscribed on a stone that has safeguarded its wisdom, Lishui's Tongji Weir is a living testament to ancient ecological ingenuity.

Today, this World Heritage Irrigation Structure not only continues to nourish fertile fields, but has also inspired the distinctive "Lishui Barbizon" school of painting. This ecological wisdom, flowing through centuries, is now painting a breathtaking picture of harmony between humanity and nature.