The golden "snake" symbol in the middle of the health code is a walking stick with a snake pattern wrapped around it, which is scientifically called snake stick and used as a medical symbol. There are two medical symbol systems in the world: one is a double snake stick with wings as the theme; The other is about a snake wrapped around a stick. The double snake-winged staff originated from Hermes' wand in Greek mythology. A snake's cane is the main symbol of Asclepius Ashibis, the god of medicine in Roman mythology.
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. 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.