ANZ, which boasts of “combating” corruption, provided banking services for years to a business controlled by a Chinese billionaire who had earlier testified to paying bribes for Australian iron ore.

Mining giant Fortescue Metals, which signed a pact dedicated to fighting graft, can also be revealed as dealing directly with a business owned by Du Shuanghua. Rio Tinto has also been selling iron ore to Du’s company and BHP has sold coking coal, as detailed in The Australian Financial Review.