You can select Unionpay from the Payment Method options when signing up for VyprVPN. The process is the same as for other payment methods.
Please note: If you were using Unionpay, but choose to use a Credit Card or Paypal to pay the invoice, which are recurring payment methods - you will not be able to switch back to Unionpay or any other non-recurring payment method. When you move from Unionpay or another non-recurring payment method to Credit Card or Paypal, all future payments will be made automatically and you will no longer have to manually pay invoices.
If you need any further assistance, please contact our 24/7 Customer Success Team, who would be glad to assist.