China Tuesday announced a flurry of retaliatory measures against the US, including tariffs on imports of products such as coal, liquefied natural gas products and crude oil, as well as an antitrust probe into Google. It also placed two other US firms on an unreliable entity list that could bar them from investing in China. China and Google have had a long and entangled relationship going back to the early 2000s. Here's a look at Google's history in China and what the antitrust probe means for the company: What is Google's relationship with China? Google launched Chinese-language search engine google.cn in 2006. It was censored to comply with Beijing's laws, and in 2009, was a major search engine in China with about 36% market share. In 2010, in response to a cyberattack and an increasing unwillingness to comply with censorship rules, Google said it was no longer willing to block search results and shut down its Chinese search engine, redirecting users to its Hong Kong site ...