West Street, Longxi County. Generally, individual study rooms are charged. If you want to use the free study room, you can go to the local library. Chengxi Street in Longxi County is open from Monday to Sunday at 7:30-2 1:30, and you can do your homework here. Longxi County is located in the southeast of Gansu Province, the middle of Dingxi City and the upper reaches of Weihe River, and the middle of Loess Plateau in the middle of Gansu Province.