Every so often Shanghai goes through various schemes to improve how it looks. For example, we’ve had the ban on the hanging out of washing and a general disapproving eye turned on the wearing of pajamas in the street. These schemes usually take hold when they’re first introduced for a few weeks then gradually everything goes back to the way it was. Take spitting for example, during SARS there were lots of public service posters about spitting, it declined a lot. The problem is a Shanghai male cannot pass an ashtray or a urinal with out feeling the…