The craft you are talking about is the processing of oolong. Ginseng oolong is made by wrapping a layer of green powder on the finished oolong tea and drying it in the sun. The technological process includes water spraying, powder coating, ball shaking and drying. The ingredients of the powder are generally American ginseng, vanilla, licorice and so on. Vanilla powder is the main ingredient Of course, the main ingredient outside the best ginseng oolong is American ginseng powder.