When I've been riding in western countries I never cheap out on tires, as they are obviously very important and more so if the bikes power is greater and the road temperature is colder or it's wet, and usually I get a top brand such as Bridgestone, Michelin etc. However in China I've had real trouble finding very good tires. Acceptable tires such as Duro or Sakura can be ordered fairly easily in my area, but aren't stocked. Questionable tires such as low-end Kenda's or Chengshin's or worse unknown or random tires are stocked, I know this is because Chinese riders think that tire longevity and price are more important than handling or wet road safety, so availability is just reflecting market demand.

So if you know of any western quality tires stocked/sold/manufactured in China, please supply some contact information and what brands sizes you have found.