Dear friends,firstly,thanks again,All the replys I had read carefully,hehe,it really exercises my English ability. These days I was thinking how to stop the arguements but still had no idea,I can just say some  words sincerely .

I really understand your thoughts and I also hope you could understand mine .I really have no bad intention. I know ,every country has diffrent culture ,we couldn't very sure which one you know is right or wrong, so we need communicate friendly, that we will know which kind of things we should pay attention when chat with others.

Italki is a very good study stage, I hope we could learn much knowledge from here ,and also could make so many friends . 

Thanks.Have a nice day! :)

(I know there are still many errors in the text ,my English is really need improved ! :)

Most of people in here are all maybe want to study language, let's study hard together,and avoid making the similar mistake like me next time.Let's together  create a harmourious society.

I also appreciate the people who give me advices about the question.A good attitude is very important no matter in the work or life.

Thanks very much!