What can you do if you get scammed in China?
Here are my answers to this question:
1. If your supplier is a registered factory or company in China, you can go and meet local officials in person, seeking help from local government authorities in China. Normally you can contact following organs in China:
AIC (Administration for Industry &Commerce), Tax Bureau, Fair Trade Department with Ministry of Commerce and local Police Station etc.
2. If your supplier is not a registered factory or company in China, you can contact local Police Station if you know their Chinese name and ID in China.

No matter what kind of your suppliers is in China, you're required to report your case in details in Chinese to local officials if you need their help. Most of local officials know nothing about English and it's hard to crack down any case with their created English names online. For example, in China, there are nearly 300000 people sharing the same Chinese name 'Zhang Wei'. Normally local officials will help you out if you or your authorized Rep reports the case to them in person in China, and the scammer can be heavily fined or forced to refund you as soon as possible. But sometimes the scammer is too crafty to be caught in China and also some local officials are badly corrupted in China and they are not willing to help you out sometimes. So Case-Report with enough proof is not 100% sure to get your money back esp when you do not sign any contract with your suppliers before. So far we have successfully got back the money for our clients in China and any reference can be available upon request.

If local officials do not help you out, you're suggested to make a small biz investigation to collect enough proof on their daily business activity in China, then consult local law firms and get ready to sue the bad supplier for their bad credit in China. By this way, you can get back your money in China; at least your supplier will suffer more from your case in China if you take above measures.