Guodian-subdiary Longyuan has given the manufacturer a 48MW deal for the Rudong inter-tidal project located in Rudong county, Jiangsu province, western China.
The project will use 21 Siemens SWT-2.3 101 turbines. The contract also includes a five-year service agreement.
Siemens said the turbines' blades will be manufactured at its new Chinese facility.
At the recent Shanghai Offshore conference, Xie Changjun, general manager of Longyuan, bemoaned the quality of wind turbines being produced by domestic manufacturers.
The comments came as Chinese turbine manufacturers including Sinovel, XEMC and Guodian United Power used the show to announce plans to develop large-capacity offshore turbines.
Speaking about the deal, Siemens Wind Power CEO Jens-Peter Saul said: "But we also see good opportunities for offshore wind power in China with its shallow water near the consumption centers on the coast. This order is an important step in entering the rapidly growing Chinese wind power market."
In October last year, Longyuan won a tender to develop the 200MW Dafeng offshore project.