This gentleman was selling snake-oil in Yining market, and was doing excellent trade.

Apologies for the smallness of the video- I shot it sideways, then had to get an adult help me to rotate it (thanks Yaz!). Also thanks to A. for the following translation:

“No side effects on the human body, does not harm the skin, a universal cure for arthritis, high blood pressure, high blood cholesterol. It was prepared from boiling a mixture of various local (ethnic) herbal medicines. When you wash your body with it, it will cure and prevent back pain, leg pain, pruritus and other skin conditions resulted from the increasing cold in human body  (cold here is like the 阴in the Chinese cosmic term 阴阳)”