Boy defecates in front of passengers on train

A netizen posted recently today a picture of a boy who defecated in front of passengers inside a train cabin believed to have happen in Guangzhou some time ago . Although he was a young boy, he seemed not to mind, pulling down his trousers and defecating all over the floor on the train during peak hours.
Some passengers did attempt to stop him but it was too late as he had already removed his pants armed with tissue paper in his hands.
We don’t know what to make of this incident as the boy could just   hold it in, get off at the next stop and find a bathroom.