The Monkey King earned his name and said the meaning of the sentence with horizontal lines in his own words.

It means don't just look at the immediate interests, look ahead and think carefully, and don't be eager for quick success. In the story of The Monkey King's Name, he was reprimanded by the protector of Taoyuan for being naughty for a while, and then he got some advice and instruction. Among them, the protector of Taoyuan told the Monkey King a word: Draw a horizontal line and another one below, and it will become a monkey's tail. The meaning of this sentence is that we should not only see the immediate interests, but also have expectations, think carefully, and don't be eager for quick success. Another meaning is that you should be good at exploring the essence of the problem and take it as the basis. Don't be limited to superficial phenomena, ignore the deep-seated causes of problems, and don't blindly listen to other people's opinions. You should have your own thinking and judgment to find the most effective solution. The Monkey King (also known as the Monkey King, the Monkey King, and the Fight to Win the Buddha) is one of the main characters in The Journey to the West (handed down from ancient times by Wu Cheng'en), a classic ghost novel in China.