Thank everybody , all of you are good guys.
I really  apprepriate all of you said, and it's will  encourage me to go on.
because I want to learn more about foreign culture
so I make a friend with Americans and some black men come form Ghana
especailly the white man ,he is friendly and have a good temper, always like a gentleman ,  the most impress me is that he and me together another friend, we spent four days on bike tour. more than 150 kilometers we had got. it was really made me  happy although I felt exhausted.  but to my surprise, when I asked before he came china what most impress him  about china, he said he didn't know anything expect large population. as far as I know, westerners only care about theirselves, now it enhance my view. some times we have a meeting for dinner, he said chinese food very very delicious
          Yesterday he had to go home, because he must   reunion with his family for Christmas. I see him off at the school gate, before he go, He gave me a warm embrace just like westerners usually do, and he also promised he will back nest year.hope we can see again.