Source: Zhuangzi Tiandao: "If you don't get sick, you should get it from your hands and keep it in your heart."
Answer like a stream. A: a. Answers flow like water. Good eloquence and quick response.
Source: "Biography of Northern History Li Xiaobo": "Elegant and elegant, the answer is like a stream."
The voice of the empty valley shouted in the valley and immediately heard the echo. The metaphor is very fast.
Source: Southern Dynasties Liang Xiaoyan's "Pure Industry Fu": "If you answer an empty valley, it seems like a shadow." Zhou Liangxing in the Southern Dynasties thought about "Thousand Characters": "Sound is heard in the empty valley, and it is heard in the empty hall."
It should be like a clear metaphor, with quick answers and quick reactions.
Source: "Zi Hua Zi Yan Zi": "If you use a key to explore the key, if you use a seal to draw it, you must take it as a kind, and its sound should be like a warning."
If it should ring, this is a metaphor for quick answer and quick response.
Source: "Zhuangzi Tianxia": "If it moves like water, it is as quiet as a mirror, and it will ring."