When the kite is in the air, the air will be divided into two layers. At this time, the air passing through the lower layer of the kite is blocked by the surface of the kite, the air velocity decreases and the air pressure increases, so the kite will rise, and the air at the upper layer will flow comfortably and the air velocity increases, resulting in the decrease of the air pressure and the kite will be sucked up. Wind characteristics on kites are influenced by air density, lift coefficient, kite cross-sectional area and wind speed.