Beijing's economic growth this year will not be significantly affected by its plans to temporarily shut down factories, reduce their production, and limit the use of cars to improve air quality during the Olympic Games, an official said yesterday.

Yu Xiuqin, deputy head of the Beijing municipal bureau of statistics, said the impact will not be great because many large factories had already been moved out of the city, and those forced to close temporarily, will be able to adjust.

"These factories anticipated (the shutdowns), and so they will be able to take appropriate measures. There will be some impact, but it will not be great," Yu said.

The city's environmental protection bureau said on Monday the municipal government will suspend or reduce production in 21 major heavy polluting factories during the period of the Olympics and Paralympics.

Beijing's GDP in the first quarter was to 214.8 billion yuan ($30.6 billion), 11.3 percent higher than for the same period last year.

Yu declined to give an estimate as to how much the shutdown from July 20 to September 20 will cost the industrial sector. But she said the services sector makes up more than 70 percent of the city's economy, and the Olympics will further boost it.

Measures to limit factory production are also planned for neighboring Tianjin, Hebei, Inner Mongolia, Shanxi and Shandong, but details have yet to be released.