1. health code: based on the actual data, citizens or workers who have returned to work can declare online by themselves, and generate personal QR code after background review.
2. Travel code: China ICT Institute, together with China Telecom, China Mobile and China Unicom, uses the "signaling data" of the mobile phone to obtain the location of the base station where the user's mobile phone is located, providing free inquiry service for 65.438+06 billion mobile phone users nationwide.
3. Health registration number: a two-dimensional code or bar code used to record personal health status and whereabouts information during epidemic prevention and control.