Each dormitory in the apartment building has its own bathroom. Hainan doesn't need hot water for bathing all year round. Moreover, the water in Haidian Campus of Hainan University is geothermal water. In June+February, 5438, it was warm and steaming at night! If you really can't stand it, you can buy hot water and boil it yourself, but there are regulations in the dormitory that you can't use it. Just don't get caught by the dormitory administrator!