History is like a thunderous name, countless heroic deeds and historical vicissitudes are related to the city. Chengguan can not collapse, but the head of the city changes the king's banner. Now the Shanhaiguan Customs City is being renovated, more and more like a scenic spot, rather than a city with a breath of life. Maybe it's a good thing for tourism. After all, it looks much better, but it lacks the sense of vicissitudes and the sense of history. Fortunately, however, the protection of buildings is much better than before. Inside Guancheng is Hebei and outside is Liaoning. Standing above Guancheng, you can see two provinces. You can imagine the life of the people who were stationed here.