Health codes are based on real data and can be generated by citizens or people who have returned to work through online declaration and background audit. As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city. The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly.
On February 28th, 2020, Shanxi Province launched the Health Code. So far, more than 200 cities in China can apply for health codes in Alipay. Among them, Zhejiang, Sichuan, Hainan, Chongqing, Shanghai, Yunnan, Shanxi, Hubei and other provinces and cities have achieved full coverage. Alipay revealed that with the increasing demand for orderly resumption of production and work, the cities covered by health codes have been further expanded and the application scope has been continuously expanded. Due to different prevention and control situations, there are differences in coding rules and application scope of local governments. Zhejiang province has the most extensive application scenarios, and the number of people receiving codes is far ahead.