The national platform is green code, how can Hubei health code become yellow code?

According to the roaming information of the mobile phone signal. According to the information about the yellow code of Hubei health code, the national platform is a green code, and how Hubei health code turns yellow is based on the roaming information of mobile phone signals. Because one of the transcoding rules of health code is to encode according to the roaming information of mobile phone signal, your health code will be automatically converted into "yellow code" or "red code" according to the different risks of the area where mobile phone signal roams. If your mobile phone number is not handled with your ID card, you need to apply for transcoding to the residential area in time.