Do you seriously think that TPP going to stop China from stealing tech if they decide to actually use it stolen source code like that?

Come on. Source code audit is pretty standard procedure in case of any government usage around the globe and there also plenty of people have access to proprietary software source directly or not. Even big companies getting hacked by enthusiast with nearly zero budget and country have almost unlimited resources.

What's more important so far China was doing great just replacing exist products using hardware available on market and without copying anyone source code.