Introduction to the Three Wonders of Tianshui: The many seven-colored pools, emerald pools, and yellow beaches with different colors formed in the middle of the stream are as beautiful as Jiuzhaigou Valley in Sichuan. Huangban Beach is 70 to 80 meters wide and more than 100 meters long. The creek bed of more than 10,000 square meters is made up of a whole rock. It is open and unobstructed and created by nature. There is not a single stone or grain of sand. It is the clearest beach in nature. "tub".