风筝最早出现在中国,是由于军事上的需要而产生的。到了宋朝,风筝才成了迎接春风的民间玩具。风筝的制作方法有简有繁,但无论怎样制作,最终目的是为了放飞。风筝的起飞在于“膀子’(着风面)设计合理和拴提线的角度正确。另外,风筝的不”闹“(在空中翻跟斗),在于左右两边的重量和升力平衡。当然,简易的风筝也可以用 Kite first appeared in China because of military needs. In the Song Dynasty, the kite became a folk toy to welcome the spring breeze. Kite production methods are simple but complex, but no matter how the production, the ultimate goal is to fly. The kite’s take off is that the ”arm“ (wind surface) is properly designed and the angle of the tether is correct. In addition, the kite’s ”trouble" (tipping over the air) lies in the balance of weight and lift on the left and right sides. Simple kites can also be used