Built in Tang Dynasty, Yuliang Dam is made of sturdy stones. It is known as "Jiangnan Dujiangyan Irrigation System", and is one of the rare ancient rock-rolling dams in China. Yuliang Dam is located in Yuliang Old Port, which is an important wharf and transfer station in the ancient Huizhou. It is said that this is the original place where Huizhou merchants began to run their businesses. Later, they had monopolized the spice in the southern provinces in the Ming and Qing Dynasty for over 300 years. Now, the Yuliang Old Street basically maintains the original atmosphere.