Isn't it because she didn't have any change on her when taking the bus, and she could only ride with a coin worth one yuan? Otherwise, she wouldn't have seen a coin lying quietly on the ground and picked it up thinking she was unaware. However, he saw it without saying that the coin was his. Two people want to take the bus, but they only have one coin. What should they do? . . Then don't take a seat and take a taxi. The problem came again, both of them were in a hurry, but only one taxi was empty, and the others were occupied. So... They both got into the same taxi without giving in, and ended up in the same university by accident...