How was Wuhan Hunyang notified?

According to relevant information, Wuhan Hunyang was notified by SMS. The sampling codes of Wuhan citizens are all bound to personal mobile phone numbers. After the mixed tube is positive, they will receive a short message notification, and the citizens with mixed positive will go to the nearest nucleic acid testing institution for testing in time, and present a short message to the nucleic acid testing institution for single-person and single-tube nucleic acid sampling.