2. Sequence Diagram

Sơ đồ tuần tự

Explanation:

1. The user navigates to the product page on the online store.
2. The online store displays the product information to the user.
3. The user adds the product to their cart.
4. The online store confirms that the product has been added to the user's cart.
5. The user proceeds to checkout.
6. The online store requests payment from the payment gateway.
7. The payment gateway redirects the user to a payment page.
8. The user provides their payment details on the payment page.
9. The payment gateway confirms the payment with the online store.
10. The online store requests shipment from the shipping company.
11. The shipping company provides shipment details to the online store.
12. The online store displays the order confirmation to the user.
13. The user confirms the order details.
14. The online store provides the shipment tracking information to the user.