Most NiMH and LiPo batteries originate from that end of the world these days. Like anything, there are good-quality batteries and there are the others. Some Chinese manufacturers have proper quality control and describe their products accurately.......and then there are the others. Some would call them the majority.
If all you look at is the bottom line then you will encounter far more of those than the former. As long as you are prepared for that then you're free to buy as you will from wherever you choose. Looking after them properly also helps their longevity.
DM