Just moved for a few days, the room light suddenly turned off by itself, then turned on the electric fan before going to bed last night and turned it off after waking up. Is the voltage unstable?

Just a few days after moving here, the light in your room suddenly turned off by itself. This may be that the light bulb is broken. Let's see if there is something wrong with the light bulb. If not, there is something wrong with the wiring. You slept with the electric fan on last night. When you woke up, the electric fan was turned off again. See if your family is afraid of catching a cold: I'll turn it off when you fall asleep. If not, there may be something wrong with the line, or the load is too heavy and the safety is broken. Then get an electrician to fix it for you. When the voltage is unstable, it will flash. You are not talking about voltage.