i have no qualms about chinese frames (i have one) or chinese wheels (i'm on the cusp of ordering some farsports 50mm carbon clinchers), but very little seems to be written about their bars & stems
It matters not whether it's chinese or not, but whether it is manufactured properly. A good proportion of the parts you buy may well be manufactured in China. If it has a brand then that company has chosen to put their name to that part and you expect a certain level of manufacture given that brand name. If it has no brand then you are using a part that may or may not be manufactured better than branded parts but you can be certain that the seller doesn't consider a brand important. Make of that what you will. It then comes down to whether or not you can have faith in where you have bought it from. I'd rather buy something that has a brand as someone is hopefully taking responsibility for that part if my life depends on it. If it's a pair of shoes, I couldn't care less. If it's the brakes on my car, it's hugely important. Bar/stem combo.....personally, I'd rather pay the extra for a branded item, but I've never been much of a risk taker!