1. Go to the eLianStar webstore in your web browser.
2. Browse through the store and use the navigation menu or search bar to find the product you want to purchase.
3. Once you have found the product, click on it to view the product details page.
4. Review the product information, including the price, availability, and any additional details or options.
5. If the product has different options, such as size or color, select the desired options from the drop-down menus or radio buttons provided.
6. If you want to purchase more than one of the same product, enter the desired quantity in the quantity field.
7. Once you have selected the desired options and quantity, click on the "Add to Cart" button.
8. A pop-up window will appear showing the item that has been added to your cart. To continue shopping, click on the "Continue Shopping" button. To proceed to checkout, click on the "Checkout" button.
9. If you have not yet logged in or created an account on the webstore, you will be prompted to do so at this point. Follow the prompts to either log in or create an account. If you already have an account, enter your email address and password to log in.
10. After logging in or creating an account, you will be taken to the checkout page. Review the items in your cart and make any necessary adjustments, such as changing the quantity of items or removing items from your cart.
11. If you have a discount code or gift card, enter it in the corresponding field to apply the discount or credit to your order.
12. Enter your shipping address and select a shipping method. If you have multiple shipping addresses saved to your account, you can choose one of those or enter a new shipping address.
13. Select a payment method. If you have saved credit card or other payment information to your account, you can select it from the list of saved payment methods. If you prefer to pay with a different method, such as PayPal or Apple Pay, you can select that option.
14. Review your order to ensure that all of the information is correct, including the items in your cart, the shipping address, the shipping method, and the payment method.
15. Click on the "Pay" button to complete your purchase.

You should receive a confirmation email with the details of your order after the payment has been processed. If you have any problems with your order or need to make any changes, you can contact the eLianStar customer service team for assistance.