The first number "5" stands for South China, the second number "1" stands for Guangdong Province, the third number "4" stands for Meizhou City, the fourth number "7" stands for Meixian County, and the last two digits. The postal code of 5 14700 also stands for "Guangdong Province".

The codes of several regions are: North China 0 (Inner Mongolia, Hebei and Shanxi), Northeast China 1 (Liaoning, Jilin and Heilongjiang), East China 2 (Shandong, Jiangsu and Anhui), Southeast China 3 (Zhejiang, Jiangxi and Fujian), Central China 4 (Hunan, Hubei and Henan) and South China 5 (Guangdong and Hainan). When you remember the numbers of these regions, you can know from which region of China it was sent by looking at the first number of the code.