Yu, a commonly used Chinese word (first-class word), is pronounced as yù. The first text of Yu is the seal word "Yu" in Shuo Wen Jie Zi, and it is "Yu" in the official script later. Its original meaning is to explain and inform, and it can be extended to the meanings of communication, knowledge and metaphor.
It is composed of "mouth" and "Yu". The word "Yu" means that the fleet passes through Shuiguan, and the whole word means that the people at Shuiguan say that the fleet should be inspected like other fleets, which leads to the meaning of explanation and metaphor. It can also be understood that the people on board said that they knew that the fleet would be inspected when it passed the customs, which led to a clear meaning.
Idioms containing metaphors
1, rare analogy is self-evident
Pinyin h m 4 n pé ré y ù, you don't need many examples to speak, you can understand. The description is very clear, from the Book of Rites and the Book of Learning by Dai Sheng in the Western Han Dynasty: "His words are also about to reach, subtle and hidden, and it is difficult to compare."
2. Far-quoted metaphors
Pinyin is yu m: n y ǐ n q ū y ?, which means to quote from a distance and make twists and turns. From "The Draft of the Qing Dynasty Emperor Taizong Ji Yi": "The ministers have a hard feeling and they also heard it according to the facts. If you don't tell the truth about the Lord, what good will it do if you quote a song and metaphor from afar and attack all the people? "
Baidu Encyclopedia-Yu