What does the green code mean?

Ship green code is a health code system for ship passengers. Passengers need to declare their health information on the designated platform in advance, and get a green code, a yellow code or a red team after approval, representing different health conditions. The green code indicates that you are in normal health and can go aboard, the yellow code indicates that you need to stay at home or concentrate on isolated observation, and red team indicates that you need medical observation and treatment. The purpose of ship green code is to prevent and control the spread of epidemic and ensure the safety of navigation.