Why is Guangzhou a green code and Hubei a gray code?

Three-day two-test or 48-hour nucleic acid test was not implemented in time. Health code is a personal two-dimensional code based on actual real data, which is generated by citizens or people who have returned to work on their own online declaration and background audit. There are two reasons why the health code is grayed out. First, the personnel from other provinces and cities failed to carry out the two-day inspection in time, and second, the personnel failed to carry out the nucleic acid test within 48 hours. The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly.