Personally my recommendation would be to not use foreign payment gateways of whose reputation you cannot verify and who make no attempt to support your language. This is mainly down to fraud as such sites exist as do phishing sites as we are all aware and they are out to sting businesses as they are users.
it's very common for people to fool sellers into such circumstances as it is for sellers to fool buyers, there are common things to look for but even such fraud checks can be bypassed as such personally I would recommend you stick to your current payment gateways such as PayPal and point them to their origin specific site (https://www.paypal.com/cn
). Or potentially use a bank transfer or similar as such facilities are available worldwide.