I did ask mention the fork failure and was told:
'The front fork failure is an exception. The fork is broken so badly, it must be man-made, and definitely not a product quality problem.'
So who do you believe — Core or Tan Tan?
I recommend reading this:
https://www.goodreads.com/book/show/5116296-poorly-made-in-chinaIt's helpful to understand cultural differences.
From that, i'd say good luck getting a factory to acknowledge they fucked up, or fucked you. In fact there are plenty of examples of that in that book (and that one too
https://www.goodreads.com/book/show/29891474-what-s-wrong-with-china).
Has to do with losing face, admitting responsibility, the norm is that they will lie to your face until you catch them red handed, at which point they go "ok fine, i tried. Want a discount on your next order?". Arguably, that may be how a toddler lies, from the perspective of a westerner. Or like my dad. As kids we recorded him snoring, played it back to him, for him to say, dead serious, "it's not me".
Given that many people here suspect that tantan isn't building this specific frame model, it adds another layer of deception to the mix. Also, forks and frames are different moulds, so what if the fork is coming from elsewhere? And if it's not a monocoque build, then the frame itself could come from several factories.