How to change the bulb of the old ceiling lamp?

Ceiling lamp is a kind of lamps and lanterns, generally installed in the bedroom and living room, as if it were adsorbed on the roof, so it is called ceiling lamp. Ordinary circular ceiling lamps generally twist around by dragging the lampshade. If it is square, it is buckled. Find the gap in the lampshade and fasten it firmly. Another is that there is a clip on the lampshade, which is stuck at the bottom. Pull the clip by hand and the lampshade will come straight down. Can you try it on? You need to remove the lampshade to see the specifications and models of the lights inside, and then buy the corresponding lights to replace them. If there is a manual, it will be clearer to study it first. You can refer to these methods. I'm glad to answer these questions for you. I hope they can help you. Wish you a happy life.