Вот их ответ:
For your request to change USD dollar into RMB(YUAN) in the future, it’s ok, but could you please afford tax refund(around 15%).as you know when we export, we must declare customs, then we can get tax refund from China government, if you arrange RMB(YUAN) to us, we cannot declare customs, it means we will lose 15%tax refund, hope you can understand our situation.
может я что-то не понимаю...