Nanjing city is also known as the stone city. But where is the stone city? Stone City is located on the west slope of Qingliang Mountain in Nanjing. During the Warring States, King Chu Wei (333 BC) built Jinling Temple here, and Sun Quan moved to Nanjing in the end of the East Han Dynasty. At that time, the Yangtze River was flowing down the city, and the terrain was very dangerous. It is said that Zhuge Liang also felt the "Shicheng Tiger" here. The stone city wall may be the oldest city in Nanjing, integrated into the Ming city wall. Nearby, there is a cool gate of one of the 13 gates of the Ming City Wall, which is also known as Qingjiang Gate because it faces the Qinhuai River outside. This gate was blocked for many years after it was built, and may have been preserved for it, before reopening in 2003. The capital of Nanjing in the Ming Dynasty and the outer Guo were often called "the inner 13th and outer 18th". The last city gate of the outer Guo, the Gaoqiao Gate, was demolished in 1953. The walls of Beijing are still reserved for most of them, of which the original Ming Dynasty city gate has only four remaining, in addition to the cool gate, the other three are Jubaomen (now China Gate), Shenzemen (now Heping Gate), Shichengmen (now Han West Gate). Qinhuai River has the words of Qinhuai outside and Qinhuai inside. The Qinhuai River has two sources of north and south, and the two rivers in Jiangning Fangshanhui synthesize the Qinhuai River dry flow. Then to Tongjimen outside the Jiulong Bridge divided into two branches: one crosses the Jiulong Bridge directly to the west, from Dongshuiguan into Nanjing City, and then passes through the Confucius Temple. It is customary to call this the Inner Qinhuai River (that is, Shili Qinhuai), which is also the most recited cultural river by ancient Chinese literati. Another branch is by Tongjimen through the Chinese Gate, which is the outer Qinhuai River and the moat of Nanjing. The outer Qinhuai compounded outside the Xishuiguan and the inner Qinhuai, and then merged to the north through the Stone City, the pasture gate, and the Dinghuai Gate, and the Sanyu River into the Yangtze River. The stone city park is also a better section of the Qinhuai River outside. The city wall is composed of bricks and red gravel, and one of the natural rock walls has a boulder. Because of the wind and rain all year round, it is depicted by nature with a protruding "grimace". Like "ghost face", so this wall is also called "ghost face city". "ghost face city" under the mirror lake, showing the reflection of "ghost face", "ghost face mirror" is the most essence of stone city park. Above the "grimace" there is a new campfire platform, the city wall all the way south to the Ming Dynasty city gate cool door, you can look carefully at the bricks on the city wall, some engraved with the name of the brick maker, ancient craftsmen to be responsible for each brick. You can climb the city wall, overlook the Stone City Park and the Qinhuai River, and overlook Nanjing City. In winter, the city wall is covered with snow. "Stone City - Snow" is a great scene in Nanjing, with "Spring Niutou, Xia Zhongshan, Qiqixia, Winter Stone City". There is Yanwang River at the northern end of the park. It is rumored that Yanwang Zhuyu in the Ming Dynasty escaped from here after offending Zhu Yuanxuan. Now there is also a pedestrian bridge on the river, strolling across the river, the riverside is windy, the breeze is willow, and the mottled city walls tell the earth-shaking changes in the long historical river, which is a good place in Huaigu.