TEMU doesn't sell those things. They're more expensive than that, but subsidised by VC capital from PDD Holdings, Blackrock, Vanguard, etc. It's a very boring 'spend the VC bucks to get the customers' play, and when they've got the customers they'll jack up the prices and lose the customers again. It's Uber-for-cheap-stuff basically.
They're being subsidized? How do you explain their fat margins, $15.4B of profits on $54.0 of revenue? https://en.wikipedia.org/wiki/Pinduoduo
Maybe there's some loss leader going on, but comparing it to "VC capital" (venture capital... capital?) doesn't make much sense, any more than calling costco's rotisserie chicken and hotdogs "subsidised by VC capital" doesn't make much sense.
I worked as a mailman a while back, most days there would be more packages in grey plastic wrap (from China) than actual mail. And you could tell that the stuff that was inside usually cost less than the shipping would have cost if you paid full price.