Watchdogs in China told the US search giant that it must keep its Android mobile operating system free for other device makers for up to five years, in order to safeguard competition.
The Motorola Mobility acquisition, first announced in August last year, would be Google's biggest ever deal. It has already been cleared by US and European regulators.
Acquiring Motorola Mobility would allow Google to start manufacturing its own smartphones and tablet devices, going head to head with Apple's iOS devices and also Samsung, which uses the Android platform for its popular handsets.
The deal also gives Google a warchest of more than 17,000 valuable Motorola patents, which are vital for it to earn royalties and defend itself and other Android phone makers from patent lawsuits.
Google confirmed that the Chinese government cleared the deal on Saturday.
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