Is the message from Baohe CDC true or false?

Really. It's true. In order to spread epidemic prevention knowledge or publicize relevant policies, the provincial CDC will cooperate with mobile companies to send text messages to specific people or people in a specific range. This is the message sent through big data filtering. Big data shows that you may have been exposed to cases or asymptomatic infections in COVID-19, or you may have been exposed to the environment or articles polluted by COVID-19.