Basically, if you are in goverment and you've stock holding in Gas cars, and they are lobbying, gas cars stay.
But in China, CCP will simply acquire controlling interest in new winning EV firm if it's better from the perspective of power/money/control over an industry, so they'll completely ignore the gas car companies.
In China, Government is Business and business is Goverment who have to think about their bottomline above all.
Less pollution = more tourism and more content public with air quality = more incoming revenue from other countries/ Less outrage from public.
EVs = No need of importing Oil as china has enough hydropower capacity and electronic and software/AI/ML industries along with rare metal industry = less money going out of the country