Is it true that Shenzhen Emergency Warning sent a text message to it in yellow code?

It's true that Shenzhen Emergency Warning sent it a text message in yellow code. Lin Hancheng, the second-level inspector of the Shenzhen Municipal Health and Wellness Committee, said that if citizens are issued a yellow code, please follow the SMS prompts and conduct nucleic acid testing as soon as possible. Emergency early warning refers to early warning information such as natural disasters, accidents, disasters and public health incidents that suddenly occur or may occur, have caused or may cause serious social harm, and need to take emergency measures to deal with them.