Cave 133, which is situated at the west facing of Maiji Mountain, is one of the large-sized caves dating from the later period of the Northern Wei Dynasty. There were 3 very fine steles out of 18 pieces of complete steles kept inside of this cave which are enjoyed a high value both in art and academic study. Based on the former research achievements and the investigation to the site by the authors for many times, this article is trying to go on discussing further more on such topic: the event of discovering these stone steles, the motif and art style and the dating for these steles, finally about when did these steles be erected into cave 133.
