That's what the middle income trap looks like. Timeline coincides with China shallowing losses from a real estate bubble of huge ghost towns and a population pyramid crisis.
China is currently planning on solving this by - you guessed it - more central planning. A whole EV industry out of nothing that is bad news for e.g. Tesla and Germany - but China will shallow the cost of pivoting a whole country of a billion people. It's bonkers honestly.
Counter argument is that the divergence looks different if adjusted for PPP:
That means China is currently getting more competitive again. Which is a smart move to kick the can of the middle income trap down the road. And a smart position to be in to buy the vast resources of raw materials they're currently stockpiling. And smart if they soon want to sell all those EVs to the world.
Conclusion: idk man, we'll see