General guards the Great Wall of General Guan, the only remaining section of the Ming Dynasty Stone Great Wall in Beijing, known as the "Third Pass of the World" in ancient times, and the most important pass at the eastern end of the Great Wall in Beijing, also known as the first Pass of Gongwei Beijing Division. The only stone Great Wall in Beijing is Shuiguan and Luguan. Shuttle in the enemy building of "General Guard", the "Zhengbei Building in the eastern part of the Pass, the dam wall, look between the ancient city walls, desolate and cold.