Don't seem to be able to locate Xili township in Ya'an on Google Map.

I also checked it and didn't locate the Xili Township. I was told that the base is in the Xili Township/Village (Xiang), Bifengxia Town, Yucheng District, which is around 17km in the north of YA City. You can locate the Bifengxia Town. And the bus from YA actually directly heads to the gorge base.