GoCoin is a full-service payment processing provider. The have a transaction fees of 1% with no charges for chargeback. GoCoin is one of the few payment gateways that supports Bitcoin payments. One major advantage of using GoCoin is they they let customers pay with the currencies they want, and let merchants pick the currency in which they want to be paid. They have an extensive knowledge base and provide API for custom solutions.
In Hong Kong, the most cost-efficient Payment Gateway is GoCoin with a transaction rate of 1% and no additional costs in setup fee or yearly maintenance. However, you may miss out on some of the security features like two factorPayment Gateways (Hong Kong)