Face it - Chinese traffic sucks.
It's blocked one way or another, they filter the ISP's, ppl try telecom billing and the numbers are blocked as fast as they come up. When you do get a call for 1 in 10,000 visitors you make what , 50 cents a call? Fuck that.
Japanese traffic on the other hand, might even be better than US traffic. Why? Because they have and use credit cards and the retentions are the best in the world. The simply take a real long time to cancel their subscriptions.
Best Japanese sponsor is DTI - send the Japanese traffic there and its all candy.
http://click.dtiserv2.com/Click/1039-99-2632