1. First, prepare the door frame stickers and some common tools that need to be replaced.

2. Cleaning the surface of the door frame: Clean the surface of the door frame with detergent, scraper and other tools to remove dirt and dust on the surface of the door frame.

3. Heating the surface of the door frame: heat the surface of the door frame with tools such as a blower to soften the old stickers and glue.

4. Uncover the old stickers: Remove the old stickers and glue from the surface of the door frame with tools such as scraper.

5. Clean the surface of the door frame: clean the stripped old stickers and glue residue.

6. Install a new sticker: stick a new doorframe sticker on the doorframe surface, and pay attention to the alignment position and smooth fit.