Legend has it..
The earliest written records of human consumption of cannabis resides with Shennong in the book, "The Herbal". Which is Chinese text concerning human use of herbs for medicinal application. Shennong experimented on himself & others using cocktails derived from different herbs, including marijuana. Shennong created a tea called 'Ma' that was unique because of it's female & male traits. Ma is made from a mixture of hot water & cannabis flowers & leaves. He recommended it to more than 100 illnesses including digestive ailments & absent mindedness. Shennong is also the founding father of Chinese agriculture & herbal medicine.