How to classify wind power levels?

If you give a simple definition of wind, you can say: the flow of air in the horizontal direction is called wind. Wind is the movement of air from one place to another due to heating or cooling. We know that the sun shines on different areas of the earth's surface. When the air is irradiated by the sun, the air in some places is hot and the air in other places is cold. Hot air is lighter and easily flies higher, rising above the surrounding cold air; while cold air is heavier and flows toward lighter air, causing the air to flow, thus creating wind. The surface is unevenly illuminated by the sun. If the temperature is high in a certain place, the air will rise, and the surrounding air will come to supplement it. In this way, the horizontal movement of the air forms wind. The wind direction mentioned in the weather forecast refers to the direction of the wind. For example, north wind refers to wind blowing from north to south, while wind blowing north is south wind. Wind power is divided into 13 levels based on various phenomena caused by objects blown by the wind on the ground or sea surface. The lyrics are as follows: Zero level wind, the smoke rises, there are no waves on the water, nothing moves; Level one soft wind, weak and weak, the smoke falls with the wind, and the grass blades move slightly; Level two breeze, the leaves have sounds, people have feelings, and the sails are raised The boat is moving; Level 3 breeze, the water is rippled, flags are spread in the wind, and branches are swaying; Level 4 gentle breeze is whistling, dust is flying, and the paper is moving with the wind; Level 5 breeze, the ride is strenuous, the water is undulating, and the small trees are swaying; Level 6 strong winds, the power lines make noise, it is difficult to hold an umbrella, and big branches move; Level 7 strong winds, it is difficult to walk into the wind, the power lines howl, and the whole tree shakes; Level 8 strong winds, the river waves are fierce, branches are broken, and sand and gravel move; Level 9 strong winds, The wind fell down the chimney, damaged the hut, and moved the roof tiles; Level 10 winds pulled out tree roots, there was little land, and the ships did not dare to move; Level 11 storms were fierce, there were less land, and the ships were swinging; Category 12 hurricanes, The destruction was more severe, the waves were huge, and the ship was capsized.