Editing Winnowing (section)

==China==
[[File:Winnowing machine.jpg|upright|thumb|left|Chinese rotary fan [[Fengshanche|winnowing machine]], from the ''[[Tiangong Kaiwu]]'' encyclopedia (1637)]]

{{Main|Fengshanche}}

In ancient China, the method was improved by mechanization with the development of the rotary winnowing fan, which used a cranked fan to produce the airstream.<ref>[http://www2.tu-berlin.de/~china/deutsch/abstracts/Vogel.html The Question of the Transmission of the Rotary Winnowing Fan from China to Europe: Some New Findings], Hans Ulrich Vogel, 8th International Conference on the History of Science in China</ref> This was featured in [[Wang Zhen (official)|Wang Zhen]]'s book the [[Technology of the Song Dynasty#Wind power|'' Nong Shu'']] of 1313 AD.