C39 Dive into the tiger's cave(part ii)

Just as Bu Te's legs were about to kick Yan Qiu's body, Yan Qiu turned to his side and kicked. The speed and strength of the kick was so fast that even the air around them began to emit roars and tremble.

If one kicked freely, it would bring about a flow of air, but this was just a normal flow of air, it was not even considered wind; when the strength and speed had reached a certain degree