1. Passengers can download, register and log in to the one-card APP through the mobile app mall.
2.APP processing: Passengers enter the carousel area on the APP homepage and click "One Card Upgrade".
3. Passengers can choose "self-upgrade" or "help others upgrade" to handle the service, and both methods are verified by the current mobile phone number SMS.
4. Passengers using one-card (mobile phone NFC) can choose an electronic boarding card from the list; Passengers who use the one-card physical card can obtain the card number by sticking the card. If they can't get it, they can also enter it manually.
5. Follow the prompts to improve the relevant information step by step, and complete the upgrade by checking "Read and agree" to obtain the health code information.