when Su Pingbei was caught in a difficult struggle, there was a sudden cry of killing on the north side.,saw Su Ping's north hand change into a fist, then waved heavily down, and all the Qin troops stood up at the same time.,the tung oil fell like rain all over the sky, and then the Qin army behind had finished building a bow and shooting an arrow. The front end of the arrow was not a sharp arrow, but a lighted flame.。