Can Neijiang Huangma get off the expressway?

Neijiang yellow code can get off the expressway. The health code is a green code at high speed, and suddenly becomes a yellow code at low speed. It may be that they have become time-space partners, such as the infected person who has been to a place within 14 days, and the trajectory of this 14 day has crossed. Whether it is physical passage or drift of communication signal, it may be considered as a time-space companion, and it will be given a yellow code at this time to play a warning role.