EVs don’t need renewables. What makes them attractive despite the bad marketing in the West is that they can be powered by anything that can create electricity, like coal; which is something China has a lot of
The transition to EVs is key to the national security of many countries that currently do not have energy security like China and even most if not all member countries in the EU.
China doesn't have a lot of coal, at least not relevant to their energy requirements. They still have to import a huge amount and remain vulnerable from an energy security perspective.
https://www.iea.org/countries/china/coal