I have read about the occurrence of hawking and spitting years ago, I'm sure it was in a proper travel writer's book [might have been bill bryson or paul theroux]; everybody farts, don't know about untidy.
But if you look up chinese and lack of empathy, there are quite a lot of articles online regarding that, some laying the blame at the communist's door as they've relegated the importance of religion, some saying money has become too important. They do have a slightly different outlook on life, death etc...maybe more realistic or shaped by the harsh realities of living in a country with 1.4 billion people.
Every country has a class system even communist china, I highly doubt an educated chinese person would do what that woman did, or spit in the street, the standards of behaviour differ. People from china could make sweeping judgements on the brits, the lager lout culture etc.., would it be totally untrue, no, is it racist to bring it up it, no.