An Observer in China is leading an investigation into... the public toilets at Shanghai train station. It might seem like a trivial subject, but Web users from the city don’t think so – not when the WCs rake in 11 million euros each year.  Shanghai residents are infuriated with having to pay to use the public toilets and are wondering where their coins go after the pay pot at the entrance. So More..me have even totted up how much the local government must amass from the pay-as-you-go services, which are the most frequented in China. Their estimates sum up an astronomical amount – around 100m RMB, or €11m a year. It's only one Yuan (0.1 euro cent) per person, but with up to 40,000 travellers passing through the station each day, the business is a profitable one.Observer Xiaodong Du went to the toilets in question to investigate. He came back with his own estimates... somewhat lower than rumour would have it.