Look for a place with an outlet to charge it
Hengyang Library (I don't know what local library you're talking about, I'll just say Hengyang Library)
1. To Hengyang Library, it is best not to study on the seat set up in the hall on the first floor, because the environment may be noisy and inconvenient to charge.
2. You can take the elevator to the third floor and look for the electronic reading room (that is, study room) according to the sign, basically every seat has a socket in front of it.
Just find a place with a plug or borrow a power bank.