May 5, 1989 (, Jisi April day), the Ministry of Posts and Telecommunications decided to ZIP code implementation in all urban and rural areas in China in two steps.

1989, the Ministry of Posts and Telecommunications, Postal Code implementation in all urban and rural areas in China in two steps: start writing sender zip code to start the transition to both write the sender and write the recipient's zip code by the yard; Post Office start manual sorting process mail, the transition to the mail sorting machines.