Introduction to Danjiang: Danjiang, named after the "Dan fish" that "winners have long lives" according to legend, is also called Danshui. It originates from the southern foot of Fenghuang Mountain in the northwest of Shangzhou City. Shangluo City and Danfeng County exit the Shaanxi border at Moon Bay, Wangjiadian Township, Shangnan County, and flow through Henan and Hubei into the Han River at the mouth of the Danjiang River. With a total length of 443 kilometers, it is the longest tributary of the Han River and a secondary tributary of the Yangtze River.