All business partners are not the same, so my advice is to do your due diligence. There are many legitimate Chinese distributors who help US firms with access to a potentially large market. On the other hand, it is your responsibility to conduct proper due diligence. Where I see firms struggle is when parties come in with different assumptions. Do not assume what's said over dinner table is more or less legitimate than what's written on paper. Spend your time to get to know the people you'll be working with, speak with their customers and check out references (not just the names they provide, but what you can find out on your own). Relationship takes time, unless you can find someone through your existing network, with credibility.