Vestas will supply 23 V110-2MW turbines, optimised with a power mode to produce 2.2MW each.
The machines will be installed at the Xuanhuihe project in Yanshan County, northern China, which is Jiangsu Sinojit's first wind development. Delivery is expected by the end of 2017.
Jiangsu Sinojit supplies rotor hubs, rotor shafts, pitch bearings, and bearing housings to the wind industry, and has previously supplied Vestas.
"We have established in-depth cooperation with Vestas over the past years, and we look forward to reinforcing this model of strategic partnership in the future," said Jiangsi Sinojit president Zhenhua Bao.
"Sinojit is a Vestas supplier and we are honoured to provide the turbines for their first wind power plant," said Vestas China president Kebao Yang.
Including today's order, Vestas has won approximately 475MW of orders in China in 2017.
In February, the company reorganised its Asia-Pacific sales office, splitting it in two with one focused on China, led by Yang, and the second based in Singapore operating in the rest of the region.