**2.1 Localities in Changxing County**

Changxing County is located in the northwest part of Zhejiang, in the transitional zone between hilly areas and the Taihu plain. Regional surveys conducted between 2002 and 2006, in total 32 Paleolithic localities were found from tributaries of Xitiaoxi River [7]. Among them, the Qiliting site and Yindinggang site were selected for excavating (described in followed). Besides, 148 stone artifacts were collected from similar stratums at other localities, which are mainly made of sandstones (P = 56.08%), quartz sandstones (P = 27.03%), quartzites (P = 8.11%) as well as a small amount of silicolites and flints. This stone assemblage is dominated by the pebble industry of Southern China [8].
