Good morning/afternoon,everyone,
i'm xxx,
i come from a beautiful town/city xxx,我来自美丽的xxx ,（不知道你家哪的,这里可以小介绍一下,凑字数,然后来个 welcome to my hometown to have a visit and i will be a good guide for you 收尾）
i'm so happy to be here with you.i like .very much,and .(你是男孩还是女孩啊,介绍一下自己的爱好什么的),if you have the same hobby with me,we can share it and become good parterner.if not,i would be very happy to try different things if you invite me.
the school is very beautiful,the teachers here are very kind and professional and you all are very lovely and nice.i hope we can have a good time living here and have a bright future,thank you.