According to Baidu's experience, painting a wall refers to a wall leveled with materials such as cement or gypsum, and is generally not decorated with tiles or paint. This kind of wall is smooth and does not stick easily. You can try the following methods to stick the hook:

Use double-sided tape or glue. You can coat a layer of double-sided tape or glue on the back of the hook, then stick the hook on the wall and press it for a few seconds, and then use it after the glue dries. This method is simple, but it may damage the wall or be weak enough.

Use a suction hook. You can choose a hook with a sucker, wet the surface of the sucker with egg white or soapy water, and then stick the sucker on the wall to exhaust air to form a vacuum state. This method is environmentally friendly, but it may fall due to temperature or humidity changes.

Use perforated hooks. You can make a small hole in the wall with an electric drill, then insert the punched hook into the hole, tighten the screw and fix the hook. This method is relatively stable, but it needs professional tools and skills, and it will destroy the integrity of the wall.