After the establishment of the Qin Dynasty, Qin Shihuang constantly visited the frontier. In 2 15 BC, Jieshi was in the east of Qin Shihuang. Jieshi Mountain, located in the north of Changli County, has hundreds of steep peaks. The top of the mountain is cylindrical and looks like a pillar from a distance, much like the pillar of the overpass that goes straight into the sky, so it is named Jieshi Mountain.
When Qin Shihuang went to Jieshi, he sent someone to carve the word "Jieshimen" on Jieshi Mountain. Build battlements and dams. Qin Shihuang offered sacrifices to the sea here, and sent two groups of alchemists, including Lu Sheng, Hou Gong and Han Zhong, to take boys and girls to the sea to seek immortality.
Later, the official geography of the Qing Dynasty, the Annals of the Unification of the Qing Dynasty, Yongping House and Linyi County, recorded:
Qinhuangdao is twenty-five miles southwest of Linyu County, one mile into the sea and surrounded by water. According to legend, Qin Shihuang tried to stay here.
Linyi County in Ming Dynasty belonged to Yongping House, and lulong county, Funing County, Changli County, Yongpingwei and Shanhaiwei were established in the territory. 1737, the Qing court added Linyi County to Shanhaiguan. Therefore, Shanhaiguan was also called Guan Yu, Chongqing Guan and Lulinguan in ancient times.
The Records of Linyi County from 65438 to 0878 described Qinhuangdao in detail:
Wangqin Island is located 25 miles southwest of the city. There is a mountain range from east to west, which is inserted into the sea and squeezed horizontally. From a distance, it looks like a silkworm, and Shuikou Mountain in Haiyang Town is also surrounded by Kannonji.
Since the Qin Dynasty, emperors and generals have regarded this place as a battleground for military strategists. In 65438 BC+065438 BC+00 BC, Emperor Wu of the Han Dynasty "traveled from Mount Tai to the east to Jieshi" and built Hanwutai here.
When Cao Cao, the Emperor of Wei Dynasty, conquered Wuhuan in 207, he was on his way back to the army, facing Jieshi in the east. He wrote a poem "Looking at the Sea" that has been handed down through the ages: Jieshi looks at the sea in the East.
The sea is so vast that the islands stand high on the sea.
Trees and paraquat are very lush. Autumn wind makes trees make sad sounds, and the sea is surging.
The movement of the sun and the moon seems to come from the vast ocean.
A trip to the sun and the moon, if unexpected;
Han is a talented star, if you take him by surprise.
I am glad to use this poem to express my inner desire.
In 409, Feng Ba, the monarch of Beiyan, proclaimed himself emperor in Longcheng (later Chaoyang, Liaoning). He sent guerrilla general Chu Kuang to lead more than 5,000 immigrants, who were transported by water to "Lin Yu in western Liaoning" and landed in Longcheng.
In October, 65438+553, the Northern Qi army made a northern expedition, and Li returned to visit Jieshi Mountain. During this period, the Northern Qi army set out from the northwest of Qin Dynasty and built the Great Wall along the Yanshan Mountains, where it entered the sea.
In 598, when Yang Liang, Hanwang of Sui Dynasty, went to North Korea, he also went to Lin Yuguan. In 6 14 AD, when Yang Di went to North Korea, he was also stationed in Guan Yu.
When Emperor Taizong Li Shimin was sent to Guan Yu, he went to Jieshi for many times to see the sea, and wrote poems with his ministers.
In 645, Emperor Taizong went to Korea and flew to Guan Yu on his way back to pay homage to the fallen soldiers. He met Prince Li Zhi and recited a poem "Watching the Sea".
Lapel to see the sea, poetry to play in spring.
Accumulated flows cross the soil and discipline, and sparse factions attract heaven.
Immortal qi congeals three ridges, and fan Bahuang.
Tidal clouds and the color of cloth, through the waves, the sun shines.
According to the shore flowers, the clouds and geese are broken.
Huai Bei has a deep and wide luck and a long wake.
Tangible is not easy to measure, passive can be measured.
Hong Tao has gone wild, and the green roads have sprouted mulberry trees.
Zhifu thought of Emperor Wu of Han Dynasty, and Jieshi thought of Qin Huang.
Nishang is not the original intention, but the end arch and the king.
Gao Shi, a famous frontier poet in Tang Dynasty, once wrote in Ge Yanxing:
Chinese characters are in the northeast. In order to repel the barbaric invaders, our generals left their families.
Stride forward together, looking like heroes should watch, and received the emperor's most cordial favor.
Fir and gold were cut into drums under Guan Yu, and flags lingered among the stones.
Until their captain in Shahai gave the order with feathers, the hunting fire of the Tatar chieftain flashed along the Wolf Mountain.
In 9 17, the Khitan captured Guan Yu and destroyed Guan Yu in order to enter the Central Plains conveniently. It also includes the Shanhaiguan area under the jurisdiction of Qidan, and has set up Qianzhou and Runzhou, where the adherents of Bohai State have been resettled to reclaim land.
Shanhaiguan in Song Dynasty was an important place for Liao and Jin immigrants. Liao and Jin Dynasties once set up a relocation state here. In order to stabilize the homesickness of immigrants, Changli County was renamed Wangdu County, and Lulong and Qian 'an were renamed Anxi County.
1368, Pingluanfu was established in the area east of Douhe River south of the Great Wall in Hebei Province. 137 1 year, Luanfu was changed to Yongping. Yongping area is sparsely populated due to many military disasters. This year, Xu Da trained in Beiping. He called the emperor and ordered Pan Jing and others to move to Yongping House for garrison.
This was the first great migration in the Ming Dynasty, and most of the immigrants settled in counties and counties in Yongping area. When immigrants come to the plains and wilderness south of Yanshan Mountain, they need high mountains and narrow cliffs or side walls as barriers to avoid the harassment of Mongolian cavalry.
1373, Mongolian soldiers from Northeast China invaded Funing County south of Yanshan Mountain, and the Ming court moved Funing County to the west of Yanghe River. Later, Mongolian soldiers invaded Ruizhou, and the Ming court revoked Ruizhou and moved the people of Ruizhou to Luanzhou. In this way, there is no pass in the vast area east of Yongping House.
1380, Yuan soldiers invaded, and Ming army commanded Liu Guang to die. Thousands of families scattered and set an ambush in Qian Min Town and Jielingkou to prevent Yuan soldiers from going home.
The Ming army sent troops from Yanhe camp to attack the Yuan army. The Yuan army retreated and entered the ambush circle of the Ming army when it arrived in Qian Min town. The Yuan army was either captured or fled. This great victory attracted the attention of General Xu Da to the strategic position of Qian Min Town.
During the Sui and Tang Dynasties, Qian Min Town was 4000 meters from Chongqing to Guandong, with mountains in the north, sea in the south, mountains in the east and stone rivers in the west. The situation is dangerous. It's a match made in heaven.
138 1 year, Zhu Yuanzhang approved Xu Da to build the Great Wall in the north. After many field visits and careful planning, Xu Da creatively used the scientific scheme of "using local materials, focusing on foot soldiers, taking grain as financial resources, and helping the army and the people in the same boat" to launch 65.438+10,000 troops and began the huge project of building the Great Wall of Ming Dynasty.
The project lasted for more than a year, and Guancheng Building began to take shape. So Xu Da changed Qian Min Town to Shanhaiguan. Shanhaiwei governs thousands of households, reaching the seaside in the south and Si 'eryu in the north. Due to the construction of the pass, Mongolian soldiers stopped harassing the eastern part of the side wall in the early Ming Dynasty, and the people of Yongping House were able to enjoy peace.