Both the city map and the district map have study rooms, which are all charged. If you have a city map, you can rent a few more boxes of books on 1 20, 50 months, half a year 100, and 200 a year. The deposit is 50 yuan, which seems to be 5 yuan a month. The price of the district map is not clear, so it should be cheaper than the city map. Speaking of silence, there seems to be no quieter place than the school study room. I suggest you come back and try both places.