Factbox: Google's footprint in China

(Reuters) - U.S. Secretary of State Hillary Clinton on Thursday called on China to investigate thoroughly the cyber attacks that prompted Google Inc to announce on January 12 it was no longer willing to continue censoring Internet search results in China, and might pull out of the country.

The following is a look at Google's involvement in the world's largest Internet market by users:

* Google launched its Chinese-language website, Google.cn, in 2006. Lee Kai-Fu ran the company's operations in the country until he resigned in 2009 to start a venture firm. He was succeeded by John Liu, who took over Lee's business and operational responsibilities.

* The company employs several hundred salespeople and engineers in three offices located in Beijing, Shanghai and Guangzhou. In September, it told local newspapers it would double its sales team within six months. Larger rival Baidu, in contrast, employs about 4,000 sales and customer service personnel alone.

* Google.cn complies with local laws requiring censorship of certain items such as pornography and "vulgar comment." Its flagship English-language site, Google.com, is not required to submit to similar censorship, but analysts say the government filters content through its own Internet firewall.

* The company controls about 31.3 percent of the Chinese Web search market, compared to 63.9 percent for Baidu, according to Analysys International.

* Google does not break out Chinese revenue figures, but Collins Stewart analyst Sandeep Aggarwal estimates Google generates about $200 million in annual sales from China. JP Morgan has estimated Google would generate about $600 million in revenue from China in 2010.

* U.S. Assistant Secretary of State Kurt Campbell told reporters on Thursday the United States had "had a number of interactions with Chinese authorities about the Google matter" and expected to have more meetings in coming days.

(Compiled by Courtney Hoffman in San Francisco; Editing by Edwin Chan, Jerry Norton and Eric Walsh)