In my experience, you can consider doing design work in the mold factory and then switch to project management. If the owner's English is good, into the foreign enterprises not only work easy treatment is also still very good. In general, after 5 years of their own really capable after the salary of at least 6k above, if you can into the foreign enterprises can reach 10K +.
Lastly, if the owner is not a government official or rich second generation, you must be prepared to suffer. Remember there is no such thing as a free lunch