Sorry , I forgot tell the funny things in Italki I meet. An Iran man add me and we just talk a week, he said he want to marry with me. The important thing is both of us are study English now, so I don't konw how to speak Persian and he don't know how to speak Chinese. Language is a magical stuff, it can let us make friends to other countries, although we can't speak other's language, we can use English to communicate.