Abstract: A large divergence is in predecessors' understanding of "Dongyi flows from the north and converges at Hui" from Yugong Shangshu. Kong Anguo, a Han scholar, thought that confluence of Jianghui River and Hanhui River was Pengli (which is Poyang Lake); Zheng Xuan insisted that Jiang River flew from the north into Juqu (which is Taihu Lake); Zeng Yunqian, a modern scholar, deemed that Jianghui River was converged with Huaishui River. This paper interprets this sentence as follows: "Dongyi" means the distributaries of Jianghui River, "BeiHui" means the confluence of Jiangshui River, and Southern Jiang River and Northern Jiang River "converge" at "Juqu".