cannot see 'Chinese companies continue to push big money to Vietnam for TPP'.
Your Vietnamese guys know little about the TPP program. In fact, US very very regrets to let China joined WTO. I can feel American's feeling, suddenly found an elephant jumps into a swimming pool. Even president Clinton has made the most harsh conditions to limit the negative impact, he also failed to image how China quickly become the top trade player, the biggest industrial producer within less than 15 years. So there comes TPP, its only purpose and all purpose is to let China outside.
So, how a free trade treaty can just exclude half of the world ? Thus a more reasonable explanation over this program can be derived, it is actually not a free trade program, it is just a simple test to detect bottom cards of all those swung countries.