All right. Going to the library to read and study requires a long stay, and the clothes should be comfortable and not too tight, which is not suitable for sedentary. The air conditioning temperature in the library is low, so it is easy to catch a cold after sitting for a long time. Wearing pajamas can protect your knees from the cold. Carry a schoolbag or a bag for things, and wrap your coat, water cup (water bottle), charging treasure, school supplies, paper towels, etc.