Yea, I've heard the Guangxi hones referred to as a Chinese hone of indeterminate grit. I use it solely because now after an excruciating amount of prep, it has finally started creating finer striations than the Norton 8k hone. I don't know that it's a true 12K hone, but it's somewhere between a Norton 8k and a black Arkansas stone, so I've kept it around anyway.