A side effect that China hadn't considered, is that Japan, for the first time since WWII, is building a military that's no longer defensive.
Japan's position is such, that they have to consider national survival beyond that of U.S. protection in the region.
If I were in a position of authority in China's upper echelon, I'd be seeing the red flags put up not only by Japan's emerging military, but that of South Korea and especially India.
The CCP is playing a dangerous game who's only outcome will be a serious ass-kicking.