Table 1.

Health code colour definition in the health code blockchain

Health code colour	Meaning
Green	Without any infection, can go out normally.
Yellow	Abnormal health or confirmed patients nearby, need to be isolated and observed at home or go out after passing the nucleic acid test.
Orange	Having contact with confirmed patients (or cured after diagnosis) requires centralised isolation and observation.
Red	Confirmed patients, need to have centralised isolation treatment.
No borders	No vaccination.
Grid borders	Vaccinated or require additional vaccination.
Solid borders	Complete vaccination or complete additional vaccination.