Introduction to the Huihui Tide: The best tide-watching spot for the Huihui Tide is in the old Yancang. There is a 660-meter-long dam on the river channel of Laoyancang. The roaring tide will be reflected and turned back when it encounters obstacles. There it will violently hit the opposite dam, and then roll back with the force of Mount Tai. Falling on the westward rapids, a row of "snowy mountains" are formed, and they rush back eastwards with a sound like a lion's roar. This is the turning tide.