Open AliPay on the mobile phone desktop. Click "Health Code". Click "Select Area: Beijing" in the upper left corner to switch the city to Nantong. Click View Now (when prompted for authorization, click Agree and Allow).
After filling in the information truthfully, click "Activate License Code". Click "OK" after confirming that the information is filled in correctly again. The system automatically generates health codes, and actively presents the health codes when entering and leaving each gateway.