Introduction to Huaihan Yuanyang Pond: Located on the watershed between the Yangtze River and the Huaihe River at the northern foot of Tongbai Mountain, it is a major landscape of Tongbai Mountain and the birthplace of the famous saying "Things that are clear will become clear, and those that are turbid will become turbid". Here at the foot of the mountain On the watershed, there are three ponds side by side, two clear and one turbid, which is very strange. The legends that have been passed down since ancient times are even more thought-provoking.