Google declined to comment on the partnership between Baidu and Microsoft. But Google says that search is not its biggest business opportunity in China. Instead, it is betting on selling ads to Chinese companies to show users outside China and selling display ads to run on non-Google Web sites, neither of which is dependent on search. Chinese advertisers spent $1.7 billion on display ads last year, one of the highest such spends in the world, according to Google. The company continues to employ 500 people in China and says revenue there is growing year over year.