Shanghai Xuhui District Library
There is a free computer on the third floor. You need to show your ID card to register for free wifi. It seems that the notebook computer for self-study doesn't have a charging socket. The atmosphere is quite suitable. After all, everyone goes to the library to read books. If you don't want to go to the library to read, Xuhui Library has a special study room. I don't remember if there is an outlet, but there should be no wifi.