Tell me some examples that make you feel terrible about being illiterate?

One day, I went to the snack bar where I usually have breakfast. I looked up and saw an ultraviolet disinfection lamp on. I didn't know until I asked the boss that it was always open for half a day in the morning and closed at noon. After disinfection for so long, I was the first customer to find it, or I was not the first sharp-eyed, but others didn't know that this lamp couldn't be used when someone was present. Reading is still very important. There may not be a golden house and Yan Ruyu in the book, but at least it can make people feel a little.