Can I Buy Chinese Herbs?

A lot of the products imported from china, like tooth baste are terribly polluted with all sorts of nasty stuff. We've done tests on some of these chinese herbs that come right into herb shops. The quality is very low. And then you can also tell that they're there dusty. They're in open bins. So those of us who are intrested in chinese herbs, how do we best source and know that we're not getting in any bad stuff along with the good stuff we're searching for? Can i menthin companies? Yes, by all means. Well, it's really difficut. You're rite.