1. What shapes did we learn when we made kites? Why is this design?

Diamond kites can reduce air resistance.

Generally speaking, the traditional kite pattern is dominated by diamonds. Diamond kite has a high center of gravity and low aerodynamic force, and the node between kite line and lifting line is above the center of gravity. This structure is very stable after being stressed. Moreover, when the kite is subjected to wind, the upper part has stronger ability to keep shape than the lower part, which can reduce air resistance.