Travelling in China can be a hard thing to do sometimes, esecially when you are trying sell your products to Chinese customers, you may found it's nearly not possible to accomplish it yourself.  Just think about if you need to do a visit to customers outside the big cities!

What if there is somebody help you to call your potential customer and get the appointment arranged? What if there is somebody help you arrange the transportation from your hotel to your customer's place? What if somebody helps you interpreting in case your customer is not very good at English?