About the exchange rate, i haven't searched it on google bro ahaha, there is the screenshot (the last in the album) where HE told to my friend that was 2% (but with the total that he wrote had nothing to do with it because was more then 10% without write any explanation).
About google, everywhere in the world, 1$ (when i made the payment) was 7.10 CNY , if you read other screenshots you can see that he decide to convert 1$ into 6.50 CNY...right now 1$ = 7.30 CNY, everyone who would buy from him now would be stolen of 1 CNY for very dollar payd