The golden border of Yuekang code is commonly known as Yuejian code (Yuekang code), and COVID-19 vaccination is required. For those who have completed the first dose of COVID-19 vaccination, their "Yuekang Code" will automatically get a blue border, and a small blue lion dance will appear in the center of the health code. For those who have completed the second dose of COVID-19 vaccination, their "Yuekang Code" will automatically get a gold border, and a little red lion dance will appear in the health code center.