Hi Benny, what does 番 means in the following sentence:

兄妹俩便作了番自我介绍:我们是“龙凤胎”茶艺师, 是“峨眉派茶艺的惟一传人”,能表演23道精彩叫绝的茶艺表演。

Also, what does 峨眉派茶艺的惟一传人 means?

Thanks!