But Gamesa has learned the hard way, as other foreign manufacturers have, that competing for China’s lucrative business means playing by strict house rules that are often stacked in Beijing’s favor.
Nearly all the components that Gamesa assembles into million-dollar turbines here, for example, are made by local suppliers — companies Gamesa trained to meet onerous local content requirements. And these same suppliers undermine Gamesa by selling parts to its Chinese competitors — wind turbine makers that barely existed in 2005, when Gamesa controlled more than a third of the Chinese market.
But in the five years since, the upstarts have grabbed more than 85 percent of the wind turbine market, aided by low-interest loans and cheap land from the government, as well as preferential contracts from the state-owned power companies that are the main buyers of the equipment. Gamesa’s market share now is only 3 percent.


With their government-bestowed blessings, Chinese companies have flourished and now control almost half of the $45 billion global market for wind turbines. The biggest of those players are now taking aim at foreign markets, particularly the United States, where General Electric has long been the leader.
The story of Gamesa in China follows an industrial arc traced in other businesses, like desktop computers and solar panels. Chinese companies acquire the latest Western technology by various means and then take advantage of government policies to become the world’s dominant, low-cost suppliers.


It is a pattern that many economists say could be repeated in other fields, like high-speed trains and nuclear reactors, unless China changes the way it plays the technology development game — or is forced to by its global trading partners.