Hello! Well let's look at that, shall we?
The worst case year was 1971, which looked like this.
11.1t per capita UK
1.1t per capita China.
The UK population in 1971 was somewhat under 56m. (https://www.macrotrends.net/global-metrics/countries/GBR/united-kingdom/population)
That gives the UK's output of CO2 to be 55,875,903 * 11.1 = 620,222,523.3t (a precise rough figure IMO, but I'm running with the available data.)
The population of China in 1971 was somewhat over 843m. (https://www.macrotrends.net/global-metrics/countries/CHN/china/population)
That gives China's output of CO2 to be 843,285,424 * 1.1 = 976,613,966.4t (another precise rough figure)
So even when the UK was at it's worst in terms of CO2 production, China was nearly 1.5 times worse.
So how are things today?
From the same source, the 2022 (the latest data for CO2 is for 2022, so I've used the same date for population) UK population is now 67,508,936 people, with a CO2 output 4.7t of per capita.
Meanwhile the population of China in 2022 was 1,425,887,337 people with a CO2 output of 8.0t per capita.
So UK's total CO2 output from the last available data was 67,508,936 * 4.7 = 317,291,999.2t
China's total CO2 output from the last available data was 1,425,887,337 * 8.0 = 11,407,098,696.0t
China is now nearly 36 times worse than the UK when it comes to CO2 production.
I don't care about that, and I don't think you should be trying to muddy the water with that sort of Marxist waffle. What next, CO2 reparations?
I think you've inadvertently tipped your hand here.
IMO a large part of the "climate change" agenda is far more about so-called 'social justice' and 'wealth redistribution' than it is any actual concern about the planet.