In Tongzhou—Beijing's historic eastern gateway and a key hub of the Grand Canal—the Wenyu River, the North Canal, the Xiaozhong River, the Yunchaojian River, and the Tonghui River converge beside the ancient Randeng Pagoda, forming the spectacular "Five-River Confluence." Natural waterways intertwine with man-made canals, shaping the unique role of ancient Tongzhou as the "Gateway to Beijing"—a place where goods were transferred, people passed through, and cultures gathered. From Hangzhou to Bei