the Yuan under Kubilai can be interpretted in roughly modern china's shape, even a bit bigger, though the specific borders of china were laid out under the Qing & PRC.

the Qing scholars do like to point out that the Qing presented themselves to their varying ethnicities in different ways though, they very purposefully justified their rule in mongolia in chinggisid terms, trying to make themselves the worthy successor of mongol world empire. their campaigns against the dzunghar were about snuffing out a competing claim for the overlordship of the mongol groups on the steppe & in tibet

oh but yeah the OP was hilariously wrong, chinggis did not complete the conquest of china lol