My shifu, Zheng Mingxing explained the gist and details of Zuanquan (Drilling-Fist) of Xingyi Wuxingquan (Five-Element-Fist) in the following video, which were filmed during his first visit to Sabah, Malaysia.
Zuanquan of Xingyi Wuxingquan by Zheng Mingxing
Location: Kota Kinabalu, Sabah, Malaysia.
Date: April 2006.