Solar and Wind started at 0.06% in 2001. That was 0.75TWh. In 2025 they made 21.83% with 2310.4TWh. That's a lot of electricity and explains why the other generation methods have gone down proportionally. This doesn't indicate a transition because the total generation has massively risen too. Hydro over the same period grew from 277.43TWh to 1397.06TWh, but by percentage dropped from 18.74% to 13.2% - I don't think anyone would argue that China is transitioning away from hydro.

For a transition to occur we would need to see a plateau and reduction in coal generation, not a 5x increase.