Our schools here usually turn off the lights at 23:00 and turn on the electricity at 6:00 in the morning. Our school can turn on the air conditioner with an electric fan when turning off the lights, but some schools can't. When the freshman first came in, the power supply was completely dead for a few days, and then there was a weak current that could be used occasionally at night. Just charge it or something. Everyone can plug it in. Occasionally, it will break for a while, and it will continue after midnight. The power outage is completely on time this semester. It is estimated that the school pays too much electricity. ........................................................................................................................................................