Imported or embedded emissions are taken into account in the carbon footprint datas (at least in the EU).

China construction sector accounts for almost half of the CO2 emissions of the construction sector worldwide. It's entirely local, and only concerns 1/8th of the world population (the Chinese population).

Also, manufacturing is low carbon compared to transportation or construction.

China just doesn't give a fuck, same as most western countries. They just build solar panels to reduce their dependency to Russia's petrol.

Edit : phrasing and added a link. My claims also come from other datasets but finding those on the phone was too long.