Zhongpan is located in Hulao Pass, Shicheng, the residence of the emperor. What does the dragon plate mean? What does the tiger distance mean?

In 208 AD, Cao Cao led a fleet of thousands of miles south to Jingzhou. Zhuge Liang went to Jiangdong to lobby Wuhou, and the weaker Sun and Liu were able to form an alliance and staged a wonderful "Battle of Red Cliffs". It is said that during his stay in Wu Dong, Kongming once passed Moling (now Nanjing, Jiangsu), once rode the Stone Mountain with Lu Su, and carefully inspected the geographical situation of Nanjing at that time. He saw the mountains headed by Zhongshan, winding in the southeast like a black dragon, and the mountains in the west stopped at Shishan, standing on both sides of the river like tigers. The scenery of "mountains and rivers meet and the atmosphere is dense" made him sigh: "The dragon of Zhongshan, the tiger of Shicheng, is really the residence of emperors." After returning home, I urged the marquis of Wu and Sun Quan to move the king here. In 229 AD, Sun Quan, the ruler of the State of Wu, proclaimed himself emperor here and made it the capital of the State of Wu.