arkened.He was a little angry but dared not speak out.Facing Shangguan Zhao, he dared to point at the other person's nose and scold him, and even if he was angry enough to go up and give him a good be...l unique to the Liao army, heralding the start of battle.The Liao army had a special communication system that used the rhythm and volume of whistle signals to transmit simple military orders quickly...