Looking for sourcing company from China

How to find a reliable sourcing company in China ?
The simple way is to  To find a sourcing company who is focus on your industry .

If a sourcing company who focus on your industry more than 10 year  , they can easily help you finish your sourcing project .

But most of the time , it is not easy to find the right person or the right company . Becuse if one company is focus on a industry for 10 years , It already gain a good profits and their company is runing very good ,they may not like to accept small order .

Most of the time , it is more easy to find a sourcing company who is doing sourcing job for 3~5 years .

Why we should choose sourcing company who is focus on your industry ?
There are two  reasons 
More professional :   They know how to do quality control , how to judge quality standard , how to avoid mistakes ,  they know how to delivery , how to pack the products well , how to fulfill a container . How to deal with custom clearance . ect .
More fatory sources : they can get better price than others

Our company is focus on motorcyle spare parts for 7 years