About Chinese tourists and their food:
It was in China, and for us their food, gently speaking, is not usual. The kitchen is very different and 70% of those who were with me could not eat local food. The body did not perceive.
Normally there could be two categories of people: suddenly! The vegans, etc. In China, there is little meat and a lot of dishes - just for them (about the beans, which are everywhere, from soup to ice cream and tea, generally silent); the second category - those who drink vodka, at least once a half year (our intestines are stronger), although they don't drink much local, but imports are cheaper than us.
And yes, if we talk about ours, then 30% of those who were with me - cooked cakes brought from home.
In short, look at yourself.