Those surnamed Cheng are good at translating mathematics.

Those surnamed Cheng are good at art (and math) and learned it from a teacher and a friend. Yu Yue said, "Don't talk, let's eat." The man was startled. Yu Yue said, "I'm all thumbs. When I was learning, I didn't burn turtles to start classes. Why? A good omen is not necessarily good, and a bad omen is not necessarily fierce. And where is the poor Confucianism? For another example, if you have good omen, worry about these days first; You get a good omen when you are fierce, and you will be disappointed or even more troubled in the future. So I just obey. " The man was silent. I asked for a book as a recommendation when I left. Yu Yue said: "I have never made friends in my life, only this teacher and friend, and the book comes first." Leave silently.

There is a man named Cheng, who is good at grasping the fate of learning (it is said that mathematics here is cool, but not in the Ming Dynasty, as can be seen in the following articles), and he came with books from a teacher and a friend (I am here). I said, don't say it yet, let's eat first. He was very surprised. I said, "I am a slow person. When I was a scholar, I didn't know anything about burnt turtles (divination). Why? " (Jim) A good omen doesn't necessarily have a good result, and a bad omen doesn't necessarily have a bad thing. Poor Confucian scholars, where there is no effort, may have been a good thing but got a bad omen. He has to worry for a few days first, but he is a bad thing and has got a good sign. Later, he was disappointed and only added more troubles. So let's just leave it to chance. "The man was silent after hearing this. Finally, I have to go, begging me to recommend another book. I said that I have made fewer friends in my life, only this teacher and this real friend. Books come first. So he left silently.