This time it has nothing to do with the Hinkley nuclear plant, but China is back in news and London is furious. In a bizarre warning, Air China has reportedly warned fliers that 'precautions' should be taken when visiting areas in London populated by "Indians, Pakistanis and black people". The comments were made in an article in the airline's in-flight magazine Wings of China. It even advised tourists not to go out alone at night, and for females to be accompanied when travelling.