In China, subject to the restrictions in the wind, usually in the Ningxia, Xinjiang, Inner Mongolia, such as wind larger open areas, wind power accounted for the major wind generators construction status, the average wind turbine needs at least 6-7 more strong winds before they can conduct Power generation. The Funan County of Anhui developed the new ultra-low-speed wind turbine, in the case of smaller wind can also generating.
From:http://www.allwindenergy.com/hummer/post/low-speed-wind-turbine.htm