Location of service department: 7: 00 ~ 23: 00 on the third, fourth and fifth floors of self-study from Monday to Friday, Saturday and Sunday, 7: 00 ~ 23: 00 on the east side of the fourth floor of postgraduate study room, 7: 00 ~ 23: 00 and 8: 00 ~1on the east side of the first floor of literature lending room. 13: 30 ~ 17: 00 The printing room on the east side of the first floor will be closed at 8: 00 ~ 1 1: 30; 13: 30 ~ 17: 00 the north side of the first floor of the book lending and returning office is closed at 8: 00 ~ 22: 0014: 00 ~ 2100 the west side of the first floor of the periodical room at 8: 00 ~1. Kloc-0/3: 30 ~ 17: 00, 8:00 ~ 22:00 14:00 ~ 21:00, 4: 00, 8: 00 ~ 22: 00/Kloc-0, the west of the literature and art lending room. 13: 30 to 17: 00.