Questions about the story of the Yang Family Generals in Peking Opera

Song Taizong was besieged Wutai Mountain, Liao proposed an alliance in Jinsha Beach, Yang Jiye expects fraud, let Taizong looks like the eldest son of Yanping pretend Taizong, the second son of Yan Guang disguise the eight virtuous king by the third son of Yanqing, the fourth son of Yan Ding, the fifth son of Yan De, the eighth son of Yan Shun escorting the driver, himself and Pan Renmei to protect the king of Taizong, the seventh son of Yan Si and the sixth son of Yan Zhao broke out of the siege to move the rescuer. Jinsha alliance at the beginning of the Liao general Yelu Xugo first sent a difficult Dailang martyred, Yangmen generals fought to the death, Erlang, Sanlang died in battle, four Lang was captured by the Princess of Liao later became the son-in-law of the Empress Dowager Xiao, five Lang died in the battle to get rid of but there are pursuing troops, a line of monks help, shaved his hair and threw the Wutai Mountain to go, escaped with his life. Bailang was saved by the Princess of Xixia and brought back to Xixia. Pan Renmei was finally designed by King Baxian, Kou Zhun and Yanzhao to force out the truth, and ended up with the law!