Hi, LaoWai!

'Chinaman' was first heard in Hollywood films by those illiterate westerners. Why you as an English teacher use it to the Chinese people you met?
Do you call you people 'Yankee's?

We say: "When in Rome, do as the Romans do." Can't you show off your happy face instead of a gray,long one?

I was born a Chinese. Before I went back, I had never seen any of the 'great scenes' in China, except those in pictures. People there are very curious about anything. Not many have subjected to western-style education. They don't know that swarming around you has violated your privacy. Especially in the interior, lots haven't seen a foreigner before. As a tourist, since you are seeking for fun, if you were wearing a smile, trying to be more friendly and associable, you'll be more welcomed.

There's an English saying: "When you smile, it seems that the whole world smiles to you; but if you cry, you cry alone!" In China, remember, since the Chinese were thought to be so nosy, they might come to your rescue, and ask what they can do for you.