How to tell the wind direction when flying a kite?

In spring and autumn, there is not much weather without wind. Generally, there is a wind of 1 ~ 2, which generally increases from 8 ~ 9 am; Around noon 12 o'clock; The wind is very strong; After 17 ~ 19, the wind gradually weakened. At the same time, the wind power is different at different heights, and the higher the height, the greater the wind power. Kites can't fly at low altitude because of ground obstacles and buildings. The height is above1.5 ~ 20m, and the wind direction and force are relatively stable, so it is very suitable for flying kites. There are more easterly winds and southeast winds in spring; The colder the weather, the more north winds. The method of distinguishing the wind direction is simple. You can tell the wind direction by observing which direction the treetops, crops or grass fall and which direction the smoke from the chimney floats. If it is a southeast wind, the kite-flying person should face southeast and northwest with his back, so that the kite can be blown into the air by the wind. For flying kites, the airflow parallel to the ground is better than the updraft, because the updraft will not last long and the wind will be weak and strong. The "wind" we talk about generally refers to the airflow moving in the horizontal direction, and the so-called updraft refers to the airflow that changes direction when encountering obstacles such as buildings.