During my time in Shanghai I was once giving some training to some cusotmers at the office. The done thing was to buy them lunch and carry on in the afternoon.

This I did, however the only lady in the group of 5 stood in front of the displayed equipment and then calmly lifted a leg and let rip.

She did this on several occassions and I am sure she was trying to put me off my stride...I continued manfully on.

Letting rip in public is quite normal in China.