It's the quintessential on-again, off-again relationship: Analysts believe the first time Google was blocked in the mainland was in 2002.
When the company agreed to China's censorship rules in 2006, a Chinese version was launched but issues quickly emerged between the two players.
It's not just Google search that's blocked. Gmail, Google Maps, Google Drive, Google Cloud, Google Plus and Google Photos are included in the long list of Google-related sites that are inaccessible.