It depends on what your school library looks like. If no one looks at it at any time and there is no infrared scanning, then there is no problem. Put it in your clothes. If there is infrared light, it is necessary to check whether there are metal bars in the book. If so, take it out. If not, you can put a can pull ring in it, and you will find less discipline when you walk through the infrared tester. If it doesn't work, you can hide it in your sleeve, and it must be on the cuff, and your hand can be held up all the time, so that the book won't slip. Then go to the infrared monitor normally, pretend to stretch when you arrive, raise your hands above your head, and then pass infrared rays. Because infrared rays only reach the height of a person's neck, this method can prevent them from being found, but only once or twice. If it is frequent, it is fake.

Haha ~