Today, Tonglu River is the largest river in Guangde and the earliest and most famous place name in Guangde. 60 BC1year (the sixth year of King Ding of Zhou). "Chu Shu rebellion, cutting Shu, Polygonum, destroy it. Chu Zi was strong, but slippery, formed an alliance with Wu, and returned. " ("Zuo Zhuan Gong Xuan Eight Years"); There are records of "Xia, Chu, Zi, Wu and Tong Lanwen" in the last ten years (the first 480 years) on Thursday. (Zuo Zhuan Lv Zhonggong was fifteen years old), so Guangde County was called Tonglu in ancient times, with a history of 2609 years.