I think the secend zi=ji
your question is "你能介绍(一下)你自己吗?"="Would you introduce yourself?"
Mmmm,my name is ZhouKe,and Jackie is my English name.I am a college student in China and I have been on itakli several weeks now.I like to chat with someone from itakli,because it can improve our language study and any other things from each other.
我的名字叫周柯,Jackie是我的英文名。我是一个中国的大学生,我使用itakli已经几个星期了。我喜欢和itakli上的人交流,因为这样可以让我们相互学习语言以及其它各方面的东西。