Can I go to Shanghai by train when the health code suddenly turns red?

I can't.

The red health code indicates that it needs to be in the home set or isolated for 14 days. After 14 days of continuous declaration of health punch, it will turn into a green code before it can pass. There are two main reasons, one is that epidemic control needs coding, and the other is that a red code and a yellow code are given for individual declaration.

Health codes are managed in three colors: green, yellow and red. The submitted health questionnaires are comprehensively evaluated and reviewed by relevant departments in the background, and health codes of corresponding colors are generated. When individuals enter and leave residential areas and city entrances, they need to show their health codes to the staff and cooperate with the inspection.

Extended data:

Precautions:

The purpose of health code is to electronize the pass, which greatly saves the tedious work of filling in, reduces the possibility of cross-infection and improves the efficiency of data collection.

The health code can be used as an individual to enter and leave the local electronic certificate, and it can be declared once, which is universal in the whole city. It is a passport to enter the relevant city, which is applicable to all people in the relevant city and those who will return.

Baidu encyclopedia-health password

People's Network-Liaoshitong health code suddenly became red.