Qiu Qian said: The kite seems to be flying freely in the sky, but as long as you hold the string tightly, it will not leave your side.
Tong Ren said: The swing seems to be swaying, but the starting point of its swing is actually always the same.
Feng Zheng looked at Qiu Qian, then at Tong Ren, and said: Why do I seem to understand what you are saying and yet not understand?