Has a very superb technology and superb performance. Used to describe a person who has superb skills and superb performance when doing something, so that he can easily complete the task in an extremely complicated environment, just like riding a swallow.

The story of flying swallow riding a horse originated from the ancient legend in China. Legend has it that a general in the Warring States period was riding a horse on the battlefield and suddenly saw a swallow flying very low. His horse jumped up quickly at once, stepped lightly over the swallow's body and stepped under his feet.