to suggest we have “just as dubious morals” as China is categorically wrong.

Only if you have a wilfully short memory and/or are wilfully ignorant of the atrocities that came with far reaching British imperialism (never mind completely ignoring the news)

With the internet at your fingertips there is no excuse:

https://www.nationalarchives.gov.uk/help-with-your-research/research-guides/british-transatlantic-slave-trade-records/

https://historyindoors.co.uk/britains-dark-past-the-atrocities-of-the-british-empire-and-its-legacy-today/

https://www.independent.co.uk/news/uk/home-news/worst-atrocities-british-empire-amritsar-boer-war-concentration-camp-mau-mau-a6821756.html

https://www.newyorker.com/magazine/2022/04/04/the-british-empire-was-much-worse-than-you-realize-caroline-elkinss-legacy-of-violence