The official pork supplier to the 2008 Beijing Olympics is to rear organically fed pigs at secret locations to provide athletes with safe meat guaranteed not to cause them to fail doping tests, write Mure Dickie in Beijing and Geoff Dyer in Shanghai.

News of the extraordinary extra efforts being taken by supplier Qianxihe Food Group comes amid international concern about the safety of Chinese food, drugs and other products following a string of scandals.