User review giant TripAdvisor will have a few worries on its mind if Google follows through on its threat to pull out of China following a row over cyber attacks on government protestors.



Tnooz has learned the TripAdvisor-DaoDao business in China currently gets around a third of all its search engine traffic just from Google.



Google has threatened to reverse its previous decision to block sites and information banned by the Chinese government, a move which effectively could lead Google.cn being blocked at the touch of a button.