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This scholar's analysis is excellent. Chinese domestic companies dont want the deal because they would face competition and thus the deal was geared to giving more advantages to the EU. So China is now saying, the deal was we give you benefits and you stay neutral.
Now that the EU wants the deal and also to sanction China for "human rights" and "genocide", China is saying yeah whatever, the deal cannot pass and thats ok with us, either way we were on the losing side from the deal
However, I said it before, Merkel knows her stuff and she will manage to pass the deal through the EU Parliament. It is impossible to me, for the Parliament to decline to pass the CAI with so many profits to made in China if the deal would pass
China made huge concessions at the end of last year, within a very short time period after having back-and-forth negotiations for seven years, to the surprise of the EU negotiation team. Clearly the pressure was from the very top (read: Xi himself), the goal is more strategic in nature than trade or investment for China.
Most of the EU politicians are bunch of idiots, a lot of styles but no substance; throughout the continent, only Merkel can be considered some kind of statesman (or stateswoman). EU is going from weak to weaker. That appears to be its destiny.