China buys Nexen
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China approved to buy Canadian energy company Nexen

10 December 2012 Last updated at 04:24 GMT

State-owned CNOOC is making China's biggest-ever energy acquisition through the purchase of Canadian oil company Nexen.

Separately, the Canadian government also gave the green light for Malaysia's Petronas to buy gas producer Progress Energy after an initial rejection.

Leisha Chi reports.