Is China buying up the world?

This week, the largest acquisition of a US firm by a Chinese company was announced. Chinese pork producer Shuanghui International had an offer of $4.7bn accepted by US meat giant Smithfield Foods, the world's biggest pork producer.

Just a fortnight earlier, China's State Grid, the world's largest utility firm, said it was investing in a couple of companies in Australia. And China is also branching out into movies. The new owner of US cinema chain AMC theatres, Wanda, is Chinese.