in the darkness, Su Pingbei's military orders are conveyed layer by layer in the form of gestures to ensure that everyone can understand what Su Pingbei means.,everyone lay patiently on the snow, although the snow was bitterly cold, but everyone knew that the main force of the Liao army had begun to jump through the tiger cliff one after another, so not only did they not feel as cold and bitter as before, but all of them were warm-blooded.,the soldiers ambushed on the edge of the cliff riveted hard and pushed the prepared boulders around them off the cliff. When the stones were finished, they took out the tung oil they carried with them. Each soldier could not carry much tung oil, that is, the quantity of three kettles, but it could not hold a large number of people.。