Charge by natural year. The air-conditioning lease of university dormitory needs to pay the air-conditioning deposit and rent to the air-conditioning management institution in the college every year, and it will not be refunded after payment. If you want to continue to use it in the second year, you need to pay again, so you will be charged according to the natural year. Attention should be paid to the use of air conditioning in university dormitories. Open the window and ventilate in time after each shutdown to keep the air fresh.