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What should I do if the health code is red on the way to Nanjing and I can't get off the highway?
On the way to Nanjing, if the health code is red and you can't get off the highway, you can update the information on the health code interface.
1. Click the health code on the Alipay page, and click View Health Code Now.
2. Click Information Update on the Health Code page. After reading the prompts carefully, click Update.