The stake is reportedly one of more than 2000 minority stakes bought by Western group in the country, according to news provider Financial Times.
Spain-based telecommunications group Telefonica has sold about half of its 10% stake in China Unicom, a China-based telecoms group, for €1.1bn ($1.4bn).
The stake was bought in 2005.
News provider Financial Times said overseas companies had taken more than 2000 minority stakes in Chinese companies in the last decade.
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