Microsoft chairman Bill Gates says Microsoft plans to invest more money in its research operations in China.
Gates says he is not concerned about the possible impact on the software maker of China's efforts to enact antitrust legislation.
Gates says Microsoft is interested in pursuing research in China aimed at developing mobile phone technology.
He says the company would be spending even more of its annual research budget in China, but didn't give details. That budget is about seven billion US dollars.
Microsoft says its Beijing development laboratory is one of its most successful research centers. China has the world's biggest mobile-phone market, with some 250 million users.

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US scientists say the typical Western diet, which is rich in red meat, white flour and sugar, increases the risk of suffering strokes and other health problems.
The researchers surveyed more than 71,000 female nurses aged between 38 and 63 over a 14-year period and found those who ate the "worst" Western diet had a 60 percent higher risk of stroke than women who ate the healthiest diets.
Besides heart disease, a diet high in animal fat, and low in fiber, fruits and vegetables raises the risk of diabetes, obesity and some cancers.
Stroke is the third-leading cause of death in the United States, killing nearly 170,000 people last year.

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Nearly 50 million people have visited the former residence of the late Chinese leader Mao Zedong in his hometown of central China’s Hunan province, since it was opened to public in 1950.
A total of 20,000 visitors came on Thursday, also the 83rdanniversary of birth of the Communist Party of China.
The place has turned out to be an outside classroom for patriotism education and most of the visitors are members of the CPC or the Communist Youth League of China.
On Thursday, the residence was full of crowds from all over the country.

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The Columbia Pictures' debut of "Spider-Man 2" took in 40.5 million US dollars on its first day, setting a new debut record at North America box office.