This is higher than the 200% to 250% it had predicted earlier in the Q1 reports. The latest figures are preliminary assessments yet to be audited, the company's stock market disclosure report said.
The increase in growth is attributed to intensified government policy support, which resulted in robust growth in demand.
Goldwind achieved "better than expected" operational results in the first six months, the company said. Excellent performance was also seen though the upgrade of products and services, and an expansion of its reach across the wind market.
The listed company was approved recently by the China Securities Regulatory Commission to issue 40.59 million new shares in non-public offering.
Goldwind recorded net profits of CNY1.83 billion ($295 million) in 2014, up 328% on the preceding year.
Statistics released by the Chinese Wind Energy Association show the firm installed a total of 4.43GW wind turbines in 2014, accounting for 19.1% of the nation's total new installations and topping the list of major manufacturers on domestic market.