China has been using digital “health codes” to track and trace COVID-19 infections since the start of the pandemic.
Tianjin has updated the Heath code system of “Jinxinban” App, “Jinxinban” Alipay mini program and WeChat mini program which shows whether a person is fully vaccinated.
Those who have completed their course of shots will have a small icon showing a shield with "Tianjin Eye" logo in the upper left corner of the green code.
In early May, Shandong Health Code has upgraded to a golden health code for people who have already been vaccinated against the new crown vaccine.