Some points you may not have considered:
1. With all due respect to the Chinese, why would we want to copy them? My reading indicates the Chinese copied the Soyuz. I'm sure they made changes, upgrades, etc, but the basic design is Soyuz........designed in the 1960's like Apollo. The Apollo was a Ferrari, the Soyuz was pretty crude by comparison. The Chinese craft: capable of doing it's job, yes. Fantastic? That may be a bit of a stretch.
Let's not get carried away......the Chinese are where we were in the mid-60's. They can devote just about any amount they want (as a percentage of their GNP) to their program. They have top people and top technology, but at this point, they are going where we have already been....45 years ago.
2. We have no idea how much money the Chinese have spent on their manned space program!!
3. I agree with some others that retiring the shuttle 5 years (or more) before we have an alternative is troubling. Begging/buying rides from the Russians and Chinese is not a good place to be.
4. Never understood why the shuttle needed to risk 7 astronauts per flight. Was that really necessary?
5. The shuttle itself has not been the problem. The delivery system has been the problem. Both accidents were caused by booster/fuel tank issues (and poor decision making). Hard to understand why they can't design a fuel tank that doesn't shed material during launch.