hall and said lightly, "Ninth Prince, have you finished reviewing your lessons"The Ninth Prince came over obediently, knelt on the ground and said, "Reporting to Mother Empress, I have already review...g. After decades of construction under the Qin Dynasty, its walls were a staggering six-nine feet thick, or over twenty meters in modern units. They encircled the entire Yueya Guan city, stretching ne...