Generally speaking, only in the past 14 days, have you "been" or "been" to the high-risk area, and the health code will change. Among them, "route" and "visit" refer to turning on the mobile phone in a certain place and staying for more than 4 hours, so if you just drive through a medium-risk area and stay for less than 4 hours, the health code will generally not change color, so you don't need to worry too much.