It's hard to argue that they're taking it terribly seriously when they continue building out massive amounts of coal power. They've got something north of 50% of the world's coal plants, and are stamping out more at an alarming rate.
Regardless of what they say, their actions would indicate that they're happy with other people being concerned about climate change, because then those people will buy Chinese panels, inverters, turbines, etc.
What's more, it's carbon intensity of production is bad, manufacturing something in China as opposed to a cleaner and more efficient country increases emissions. So it makes zero sense to give them subsidies that relatively disadvantage cleaner countries, as part of global efforts to reduce carbon.
It's the same as emissions per capita. That's actually worse than meaningless it's actively detrimental because rewarding that metric creates all sorts of perverse incentives around increasing population growth and restricting quality of life.
And I didn't bring up total emissions by country, I was replying to someone else who did. Apparently you weren't so concerned about it when it was wrongly claimed that China was the 2nd largest polluter.