Why the google search engine is not available in China
Google Search in the form of Google.cn once comprised more than one-third of China’s search market. In 2009, the Chinese government started demanding that Google self-censor results and remove links to certain overseas websites. Google refused.
Then, when an alleged state-sponsored attack on Google servers attempted to hack the accounts of some Chinese dissidents, Google decided to end its mainland China operations entirely.
In 2010, Google shut down Google.cn and instead redirected all mainland traffic to Google.com.hk, its Hong Kong search portal.
In the time since, Google’s share of the search market dropped to less than three percent.
China now blocks all Google services including Gmail, Hangouts, Google+, Maps, and Translate.