It took a lot of research to discover Topping is from China?
As mentioned here it was one series of the L30 - I'd like to see a company with any type of history which has not had a bad product or series. Just look at US and EU car manufacturers, a damn joke how many recalls.
I hope you do understand that a ton of "made in the US" and EU stuff is just assembled there, while most of the components are form Asia.
In the realm of audio, I'd take a Topping amp over a Schiit amp any day - for performance, build quality, and quality control.
Americans make good stuff, and shit, EU companies make good stuff and shit, companies in China make good stuff and shit - making shit is not country specific. It sounds that your "lot of research" is limited to geography rather than the company/products.