After reading the homework for the second time, I found that the whole movie was full of various hints and the characterization was wonderful. Although the plot can't be considered in detail, it's still great. So while watching, count the small details that can be praised:

1. The movie OP is a simulation room on the chessboard, playing chess with the old man, and finally the old man said that he had built a model to echo it.

2. When playing chess, mathematicians were mentioned. Godel founded this theory and committed suicide, implying the end.

The invitation letter was read by the old man who wrote it.

Uncle also drank wine in the library.

The old man is waiting for the young man to drive by the roadside. . . )

6. The license plate number of the old man is divided into two prime numbers, which is a partial proof of Goldbach's conjecture, while the license plate number of the young man is 7 1 12. There is a big gap between the two, which echoes the following.

7. The conversation between several people at the dinner table is simply an amplification of several people's personalities.

8. Part of the gas station makes people feel that Fermat is a fierce person, and it can even be misunderstood that Fermat killed the clerk because of an emergency and was angered by the talkative clerk. It reminds people that the puzzle in the secret room must not only be because the uncle beat Fermat's daughter, but this part can be written into the textbook.

But since then, the film seems to be boring. . . By relying on the Olympic math problem until the end, the uncle who likes drinking and can't even strike up a conversation suddenly became a detective Conan or something. . .