Many people have heard the story of bamboo poles crossing the city gate when they were young. It's about a man holding a long bamboo pole, who can't cross the city gate in any case, and then following the advice of others, he cut the bamboo pole across the city gate. In the evening, Qi Jia's mother told the story in the book. After she finished speaking, she wanted to know if she understood. She compared books to chopsticks. She motioned to him what to do if he couldn't get in. She took the chopsticks and sent them in the direction of the book without hesitation, as if it were a very simple question.