Win -Win for both. But China lost more without the deal. Certain parts of US strategy is clear, China saw that from the beginning.
It would have been better for China if EU - China furthered its integration, even if China “sacrificed” a bit more in the short term. “Sacrifices” China can more than make up for in the long term.
Additionally, the deal would’ve set up high standards for liberalization of investments, regulatory framework, sustainable development, and many other areas that would benefit China.
Finally,China’s opening up process is based on a theory of “learning by doing”. CAI would’ve provided a good opportunity for China to further adapt its industries (esp. it’s service sectors) to new and emerging standards/practices.