Last year, China generated 834 terawatt-hours of solar power.
Which is more than the G7 countries generated, and more than the US and EU combined. In fact the only country group that generates more solar power than China is the OECD, all 38 countries of it.
Data: @ember-energy.org
Source: https://bsky.app/profile/nathanielbullard.com/post/3lsbbsg6ohk2j
Not about altruism, just contradicts your prior claim of “energy security”. Maybe they’re switching to renewables because they do care about the environment and because they’re affordable?