大发单双大小押法简介：After Shanhaiguan is Beijing, how can a great empire with its capital in Beijing tolerate Shanhaiguan, a mere 600 miles away, which is the national border? If it is missed, the capital may not be protected?
After Shanhaiguan is Beijing, how can a great empire with its capital in Beijing tolerate Shanhaiguan, a mere 600 miles away, which is the national border? If it is missed, the capital may not be protected?
