The postcode of Guangzhou is 510000. Guangzhou, also known as Yangcheng and Huacheng for short, is the capital of Guangdong Province, a sub-provincial city, a national central city, a megacity, an international metropolis, an international business center, an international comprehensive transportation hub, a national comprehensive gateway city, the first batch of coastal open cities, and the headquarters of the Southern Theater. Guangzhou is located in the south-central part of Guangdong Province, on the northern edge of the Pearl River Delta, near the South China Sea and Macau. It is the southern gate to the world, the core city of Guangdong-Hong Kong-Macao Greater Bay Area and Pan-Pearl River Delta Economic Zone and the hub city of the belt and road initiative. Postal code is usually composed of Arabic numerals, which represents a special code of the post office that delivers mail, and it is also the code of communication between residents and units within the delivery range of this office. China&;s postal code adopts a four-level six-digit coding structure. The first two digits represent provinces (municipalities and autonomous regions); The first three digits indicate the postal area; The first four digits represent counties (cities); The last two digits indicate the delivery office (office).