when Su Pingbei was caught in a difficult struggle, there was a sudden cry of killing on the north side.,and the remaining main force obviously did not want to delay any longer and began to jump off the cliff through the tiger one after another.,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.。