First off, Shinko tires are made in South Korea, not China.
That said, I have used them for about 8 years and at least 50,000 miles. In my experience, they are good tires that wear well, give good handling and offer great value. I have used other brands as well, Metzler, Continental, and Bridgestone, and honestly can't tell the difference in performance.
People will ask how much your life is worth, but when you buy a tire the question is how much are you paying for advertising, mention in magazine articles, promotional events like sponsoring races and race teams, and the socialist activities of the home country. While the fact that some racing team uses the same brand tire as you do is pretty cool, does the cost of sponsoring that team REALLY get you a street tire that is that much better? How do the taxes paid to support a socialist government get you better handling or rubber compounds for wet performance?
As near as I can tell, when I buy a Shinko, all I'm paying for is a tire. A tire made by the same incredibly hard working people who make excellent phones, televisions, cars, robots, machinery, and appliances for your house. I kinda like that.