UnionPay is a China-based payment card operator that is mainly in use in Mainland China. In terms of the total value of transactions processed, UnionPay is even larger than both VISA and MasterCard, although the latter two are more commonly known outside of China.
Because of the lack of alternatives available in China, many Chinese forex traders rely exclusively on UnionPay to fund their trading accounts. The number of forex brokers that accept UnionPay is therefore pretty large, and we can expect all forex brokers that are targeting the huge trading community in China to accept UnionPay as a payment method. Payments with UnionPay are normally charged the same fee as payments with other cards like VISA or MasterCard.