I haven't found any library that stipulates that no stools are allowed. I often sit in the library, but the landlord should pay attention: never bring the same stool as the public stool of the book. It is estimated that it is nothing to bring in, but it will be troublesome to bring it out. ......

No kidding, I suggest the landlord bring a small plastic one, or a folded one, which is convenient in case it is not easy to get into trouble.

Finally, tell a joke about a stool that happened to me. When I was in Spring Festival travel rush, I couldn't get a seat ticket (let alone a sleeper) and worried about how to stand for one night. Someone sold Mazar (Little folding stool) at the gate of the railway station, and bought one without hesitation. Even at ordinary times 10, it costs 30 here. Then I got on the bus and found that there were so many people that there was no room to stand. So, many people, including me, bought benches and stood with them all night.