1. Online inquiry: You can inquire through the official website or postal code inquiry website of the State Post Bureau. Enter the detailed address information on the query page, and you can query the corresponding postal code.

2. Post office inquiry: You can go to the local post office to inquire and provide the staff with detailed address information, and the staff will help to inquire the postal code.

3. Telephone enquiry: You can call the postal code enquiry telephone "184" for enquiry. After dialing, enter the detailed address information according to the voice prompt, and you can find the corresponding postal code.

4. Hukou Book: If the home address has a postal code, you can see it from the Hukou Book. Generally, police stations have files. If you need to go to the police station to ask.