There's no reference to forced labor anywhere in the article. It's just typical Chinese migrant labor, going from absolute 3rd world subsistence farming to a crappy, dangerous tenement factory job because that's actually an improvement.
So I'm not sure boycotting their work product is necessarily the right moral call here, even if it were possible.
Let's just ignore the copious evidence of rape, false imprisonment, enslavement, organ harvesting, mass sterilization, forcing young girls to live with abusive Han families, etc. because this one single article doesn't directly reference forced labor.
I see you're acquainted with the gish gallop.
Do you wish to make the claim that the BBC's investigations which have reported on that activity are reporting false information? Or do you have some evidence of your own to provide? Do you have anything to add other than cheap denials of established facts?
That article disputes the validity of one of the BBC's sources. (I'll note that it seems to take state propaganda at face value, which is pretty questionable). What about all the other sources and findings of the BBC investigations? Is it all just one big conspiracy?
If you're serious about it then assume you can't be sure and plan your purchases around that.
Stop buying Chinese goods.
I don't think you can make _sure_, so an alternative could be to donate to human rights charities.