1. International postal codes are postal codes used internationally to distinguish different countries. The format is: country name + postal code + place name code + country name + postal code + place name code, for example: Singapore?999002?XJP, Denmark?999017?DM, Sweden?999027?RD, etc.

2. China does not have international postal codes. If you send international letters, you do not need postal codes.

Postal code, (English: Postal Code, also known as postal area code), is a code that a country or region divides into the country in order to realize the automation of mail sorting and the digitization of the postal network and speed up the delivery of mail. Way. The postal code system has become one of the standards for measuring the level of a country's communication technology and postal services.

Postal codes are usually composed of Arabic numerals, which represent a special code for the post office that delivers mail. It is also a code for residents and units within the delivery range of this bureau. Postal code is a special code for postal communication to realize machine sorting of mail. It is a necessary tool to realize postal modernization. The ultimate goal is to improve the speed and accuracy of your letters during the delivery process. Therefore, be sure to write it down when sending letters and packages. postal code. To automate mail sorting and digitize the postal network to speed up mail delivery.