I have never heard of a Yulong Sabre D18 having any issues whatsoever. Grant Fidelity is a U.S. company with outstanding customer service and support (by all accounts I have ever seen including my experience), and hold their manufacturers responsible and warranty issues go through them. I think this type of business model is the way to in the near future. That being said, I wouldn't feel as comfortable dealing with Chinese manufacturers directly.
Have you had specific issues with Yulong since they have partnered through Grant Fidelity such as with the D18 or A18? Or you just lumping him and Grant Fidelity in with your impressions of China audio manufacturers? I have never heard of an issue, and would like to make sure we aren't unfairly giving people false impressions.
I get that, and I'm definitely not wanting to argue or anything like that. I just want to know what issues you have had. You mentioned Yulong in particular, but all of your comments have been stereotypical Chinese manufacturing comments. I'm trying to separate the two with some facts about Yulong in particular. If you had something from them fall apart, what was it? If not, just clarify that you wouldn't trust Chinese manufacturing in general but don't have any direct experience with Yulong. My two cents at least...