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Also located in the Inner Mongolia Information Park , the title of largest data centre in the world is held by the China Telecom Data Centre , which spans a grand total of 10.7 mn sq . ft and contains “ contains a cloud computing data center , call centers , warehouse , offices , and living quarters for staff ”, according to the World Data Centre . Also the most expensive data centre in the world , the facility is reported to have cost over $ 3 bn to complete . Several factors make Hohot an attractive location for the world ’ s largest data centres : an average annual rainfall of over 12 in results vast reserves of hydroelectric power and , according to Data Centre Dynamics , “ Hohhot ’ s climate makes for another practical reason it has become a data center hub . At an average altitude of 1050 meters , the average temperature is 6 ° C ( 42.8 ° F ) makes for “ free air cooling for up to eight months a year ”.

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