2. Generally, you only need to fill in the domestic postal code. If you are worried, you can add P.R.China (short for People's Republic of China (PRC)).
Extended data:
Postal Code (English: postal code, also known as postal code) is a coding method for a country or region to divide the whole country in order to realize the automation of mail sorting and the digitalization of postal network, and to speed up mail delivery. Postal coding system has become one of the standards to measure a country's communication technology and postal service level.
Postal code usually consists of Arabic numerals, which represents the special code of the post office that delivers mail, and is also the communication code between residents and units within the delivery range of the post office. Postal code is a special code for postal communication to realize mail sorting, and it is a necessary tool to realize postal modernization. The ultimate goal is to improve the speed and accuracy of your letters in the delivery process, so be sure to indicate the postal code when handing in letters and parcels. In order to realize the automation of mail sorting and the digitalization of postal network and speed up mail delivery.
At present, more than 140 countries in the world have successively implemented the postal coding system, which is regarded as one of the standards to measure the communication technology and postal service level of a country. Postal coding rules in different countries are not uniform.
Foreign postal code:
American coding rules
Zip code is a registered trademark of the United States Postal Service.
The first digit of the zip code represents the state of the United States, the second and third digits together represent a region (possibly a big city), and the fourth and fifth digits represent more specific regions, such as small towns or regions in the city.
French coding rules
The postal code of France starts with 1972 and has * * 6 digits. The first two digits represent provinces, and the last three digits represent cities, regions or post offices respectively.
Japanese coding rules
The new postal coding system developed by Japan Post was put into use on February 2nd, 1998. The purpose of developing the system is to meet the needs of the expanding postal mechanization operation, improve the operation efficiency and ensure to provide users with stable, cheap and high-quality services. Its main features are as follows:
Postal code digits: 7 digits, with "—"between the first three digits and the last four digits;
Text structure: all numbers are used;
The connection between the old and new postal code systems: three or five digits in the old code are taken as the first digit of the new code; The particularity of the new code: every small part of the address (such as cho and oaza) is designated as a number, which is connected after the existing postal code. Large enterprises and other business centers can have special codes.
Russian coding
Russian postal code consists of 6 digits, such as 1.25075, where the first 3 digits represent provinces or big cities and the last 3 digits represent delivery post offices.
References:
Zip code _ Baidu Encyclopedia