1, Know a horse from a distance, know a saint in the virtual world, dà oyu m: nzh and j, sh zhi zh and xiá n. The idiom means that a good horse can only be distinguished by a long journey, and a talented person can only be distinguished by hypocrisy and cunning in the world. Metaphor after a long period of training, to see the pros and cons of people.
2, the source introduction: The Three Kingdoms Cao Weizhi's "Crossing Toes": "Although the Lord knows. Must be a hero. Mantis sighed. The strange stone is tapped. Frog of the King of Yue. This country sacrificed its own life. Know your horse from a distance. A hypocrite knows a wise man. Reply. The moment of the sky. "