Open barley net official website and log in. In the navigation bar at the top of barley net's homepage, find the "My Barley" option, hover over it, and a drop-down menu will pop up. Select the "Account Settings" option from the drop-down menu to enter the account settings page. On the Account Settings page, locate the Payment Settings option, and then click Enter. On the payment setting page, you can see the current default payment method. If you need to change the payment method, you can click "Change" button. In the pop-up payment method selection page, select the payment method you need, such as Alipay, WeChat payment, bank card, etc. After confirming the selection, click the Save button to save the changes.