Medical uses for hemp in China has a long, documented, cultural history, using all parts of the plant — the seed, leaves, “juice” (oil), roots and flowers — in both oral and topical applications. Interestingly and perhaps controversially to some, there does not seem to be a strong tradition of smoking the cannabis flowers… where some texts considered that part of the plant to be poisonous. For the record, the earliest known references of hemp leaf medicinal tea is from 2700 BC while the earliest textual medical reference to using hemp seeds is from the 14th CE.
Following are a list of over 30 nations that allow the cultivation of industrial hemp. As of this writing, the three primary produces are Canada, European Union, and China. Canada primarily produced hemp seed which is used for human food consumption (shelled hemp / hemp hearts, hemp oil, and hemp protein). The European Union primarily grows hemp for fiber with the two primary end-uses being paper and automotive composites. China grows hemp primarily for textiles that are made into clothing and hemp cordage.