The “laowai” in China is advised not to take some of local behavior too personally but to be flexible and prepared for people to act very differently.  Spitting is very common, even indoors.  Pushing and jostling in crowded areas, jumping ahead of people in line (queues), as well as ignoring rules (such as “no smoking”) happen often.  Locals often laugh aloud at foreigners and catcall — actually yelling out “laowai” as they walk by.  Anyone who looks obviously different will be intensely stared at.  These behaviors are seen more frequently in the rural parts of the country but also take place in the large, metropolitan areas.