I agree with you that they are in the copy and modification mode, but keep in mind they can do it at a fraction of the cost. U.S and Euro research has become unsustainable considering the monies that are spent. This is why research Bio's have been a group to avoid.
Let's hope that China will learn from the USA that they can't continue to steal things (Panama Canal and biotech ideas)....they will pay for that through penalties of some sort (tariffs and being frozen out of our markets)...BTW, I don't think that the Chinese are as overweight as the US is, right?