1. First, go to Fudan. Off-campus personnel scan the QR code at the gate of Fudan University, and then swipe their ID cards to enter the campus.

2. Find and enter the school canteen.

3. Borrow the corresponding campus card from Fudan University students for dining.

4. Choose the dishes you want to eat, and then use the campus card to check out at the cashier.

5. Return the campus card and credit card, and you can eat.