A lot of high income countries did not have their industrial revolution less then a century ago. That was a bit post WW1, so it was mainly Western Europe besides the Iberian peninsula, US, Canada and Australia, which were industrialized a century ago. Japan did really start to grow in 1960, as did Spain and Italy. South Korea went up in the 1980s. Many already have had peak per capita emissions some time ago. Then you have problems like South Africa and Russia, which both have high emissions, but are not that rich. Russias per capita emissions are above those of the EU since 1951 for example. Time is also a problem, as in countries have falling emissions and others have increased, so that needs to be included. Also technology changed. Things like solar, wind turbines, electric cars, even electric trains, nuclear power plants and so forth are well developed technologies today. That was not the case a century ago. Besides that global climate change and knowledge of human impacts of it, are relativly recent, it only started being a somewhat discussed political point in the 70s.

Point is, that it is complex and there honestly should be a formular to determine each countries contribution and that should include new emissions. Depending on how it is calculated that can absolutly include China.