Leave NOW and invest in your own country....
China is growing at the expense of good jobs in your own country. Leave China now so there is still time to invest in the same money for manufacturing technology in a country that is more friendly to Western companies. China will soon be headed towards higher wages & benefits that equalize any cost differences.
Several years ago, I knew of an entrepreneur making oxygen generators in the USA who had the bright idea to take his business to China. The long and short of it was the Chinese contract manufacturer copied his products and undersold him. Others have suffered the same or worse.
While no place is immune to IP theft, the further your manufacturing is from direct control and inspection, the more likely it will happen.
Biting the hand that feeds IT
