根据历年获取的考古调查和发掘资料,阐述了西古城形制和功能,指出西古城为单城形制,其性质分为两个时段,唐天宝年间只是三代王大钦茂的王城,与中京、卢州、显州无涉,唐天宝年后至渤海灭亡只是渤海诸王的陪都,同样与中京、卢州、显州无关。 Based on the archaeological survey and excavation data obtained over the years, the system and function of the ancient city in the west are expounded, pointing out that the ancient city of Xigu is a single-city structure, and its nature is divided into two periods. During the Tianbao year of Tang Dynasty, it was only Wang Cheng, Obviously no state of affairs, the Tang Bo after the fall of the Bohai Sea to death is only the capital of Bohai kings, also with Beijing, Luzhou, Xian has nothing to do.