Who needs trucks in China?

These pictures were taken by a French photographer, Alain Delorme in Shanghai throughout 2009 & 2010. He called the series, Totems. These couriers - mostly migrant workers from other parts of China - not only need strong legs but also acrobatic skills to balance these massive loads on their tricycles & bicycles while on the move. A lot of you must be wondering where the centre of gravity is in each case.