If the library of Chinese Academy of Sciences is self-study, it doesn't need to spend money to get a card, but it needs to get a card to borrow books ~ Now the library can only go in for self-study at 9 o'clock in principle ~ It should be said that there are still many places inside ~ There must be places at 9 o'clock in the past ~ The environment is quiet ~ So it is very convenient to study here ~