Wei Boyang
Encyclopedia
Wei Boyang was a noted Chinese
Chinese people
The term Chinese people may refer to any of the following:*People with Han Chinese ethnicity ....

 author and Taoist alchemist
Alchemy
Alchemy is an influential philosophical tradition whose early practitioners’ claims to profound powers were known from antiquity. The defining objectives of alchemy are varied; these include the creation of the fabled philosopher's stone possessing powers including the capability of turning base...

 of the Eastern Han Dynasty. He is the author of The Kinship of the Three
The Kinship of the Three
The Cantong qi is deemed to be the earliest book on alchemy in China. The title has been variously translated as Kinship of the Three, Akinness of the Three, Triplex Unity, The Seal of the Unity of the Three, and in several other ways...

, and is noted as the first person to have documented the chemical composition of gunpowder
Gunpowder
Gunpowder, also known since in the late 19th century as black powder, was the first chemical explosive and the only one known until the mid 1800s. It is a mixture of sulfur, charcoal, and potassium nitrate - with the sulfur and charcoal acting as fuels, while the saltpeter works as an oxidizer...

 in 142
142
Year 142 was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Pactumeius and Quadratus...

 AD
Anno Domini
and Before Christ are designations used to label or number years used with the Julian and Gregorian calendars....

.
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