How to notify the Beijing mixed test positive?

I will be notified by SMS from China Mobile, China Telecom and China Unicom.

1. After the implementation of new epidemic prevention and control measures in Beijing, the results of nucleic acid detection in the whole city found mixed positive people.

2. I will receive SMS notifications from China Mobile, China Telecom and China Unicom.

3. The person who receives the short message takes the short message to inform the nucleic acid detection point for free single-tube detection.