How is there a red dot on the international green code?

There is a red dot on the international green code because it passes through a high-risk area.

When the green code suddenly turns red, you need to open Alipay to search for the health code, then click Update and then click the FAQ link, check the color description of the health code again, and click the government service hotline to consult the discoloration rules of the health code. It is also possible that the health code of commuters going to areas with high epidemic risk will change color.