1. Avoid breakage: If someone gives you an old bookcase, you should try to avoid accepting broken or incomplete furniture. According to the traditional concept, broken furniture will bring bad atmosphere or misfortune to the family.
2. Avoid the burden: When accepting the old bookcase given by others, you should know whether you really need such a piece of furniture and whether you have the ability to undertake the responsibility of maintenance and use. If you don't need, use or like this old bookcase, you can politely refuse to accept it.
3. Cleaning and purification: After accepting the old bookcase, you can carry out a thorough cleaning and purification to remove the gas field and energy that the old owner may leave on the furniture. For example, you can wipe the surface with clean water first, and then put the books in order. This answer is for reference only. Don't be blindly superstitious.