Yunnan Baiyo is a herb used to stop bleeding. It also is a brand of Chinese health products. I had no idea of the anti-bleeding properties when I bought the toothpaste. And I must say that I have had no bleeding since I started using it. (Smile.)
Anyhow, it's a basic white paste with a mild minty flavor. I like it.
If you click on the image, you can see a few interesting uses of English on the instructional sheet that came in the box.
Amazon sells it, but I'm not sure if what they sell is the same paste. (The package is different.)