Brief introduction to tides:
Tide, as its name implies, is a natural phenomenon related to the periodic fluctuation of seawater. According to the principle of Chinese word formation, the day is morning and the night is evening. Add a water word to make a tide.
Anyone who has been to Hangzhou knows that the Qiantang River, especially in August 18, is in the autumn equinox season. Under the joint action of the moon, the sun and the earth, the Qiantang River has formed a magnificent tide, and the trumpet-shaped terrain has promoted the scale of the tide to a greater extent, which is known as the first tide in the world.
When the ancients watched the tide, they were amazed. Even Su Shi, a great poet in the Northern Song Dynasty, left his Mo Bao. August 18 tide, spectacular world, when the tide came, at first I saw a white water belt in the distance, accompanied by rumbling sound, running quickly to the destination, just like a train coming to the station.
Getting closer and closer to us, the stormy waves take off and cross the river as a reminder. After the climax, they fly away quickly and gradually disappear into people's sight. Sometimes they come back like naughty children to kill a comeback and suddenly attack, which often surprises the tide watchers and makes people feel very happy that you have come.
According to China's ancient books, the sea is water, the early tide is the late tide, and the late tide is the late tide. There is a flat tide period between high tide and low tide, and the water level does not rise or fall. The ancients living by the sea were very depressed when they saw this phenomenon, because at that time, technology was underdeveloped and their cognitive level was limited. People attributed it to Hebo or the sea dragon king who was angry with people and asked them for a tribute.