Mianchi is the name of an ancient pool. "Shui Jing Zhu" written by Li Daoyuan of the Northern Wei Dynasty says: "There is Xiong'er Mountain to the north of Luoshui River, and there is a pond on the edge of the mountain, which is called Mianchi in the world." "Taiping Huanyu Ji", the history of music in the Northern Song Dynasty, records: "Mianchi, the name of the ancient city, was in Qin Dynasty The land of Zhao Huimeng. "Yu Gong Zhu" written by Cai Shen of the Southern Song Dynasty said: "Mian is regarded as a 'strider', which is also a water insect (that is, a golden-threaded frog, also known as a native duck). There is a pond in the west of the city. It is called Mianchi when it is filled with water." "Mianchi has a history of more than 2,300 years.

According to historical records: Mianchi, also known as Zhuchi in ancient times, was a border town of Luodu. It was also called Pengchi in the Western Han Dynasty, Mianchi in the Wei Dynasty of the Three Kingdoms, Shaanting in Mangxin, Tianchi in the Tang Dynasty, Shaozhou in the Jin Dynasty, and Mianchi and Mianchi in the Jin and Ming Dynasties. The names are different and each has its own basis.

As for where Mianchi is, there are different opinions. "Shui Jing Zhu" says: "There is Xiong'er Mountain in the north of Luoshui River... There is a pool between the mountains. The water in the pool flows southeast and there is a pool on the side of the water. It is called Mianchi in the world." But in Volume 16, it is said in the Gu Shui chapter: " The current valley water flows out of Yanggu in the Matou Valley in the east of Qianjiao, and flows northeastward through the Mianchi River. "Although the above records are from the same book, from the two accounts, Mianchi does not belong to the same place. Xiong'er Mountain is located in the southwest of today's Mianchi County (now Xilicun Township, Shaanxi County). There is a water next to Xili Village at the foot of the mountain. "Shui Jing Zhu" says Xidu Water. This water flows southeast through Yiyang and into Luohe River. The valley water originated from Yanggu in the Ximatou Valley of today's Mianchi County (near Duanyan and Zhangcun in today's Shaanxi County). This water flows into Jianshui from the northeast, runs through the entire east and west of Mianchi, and then flows eastward through Xin'an and joins the Luo River. Judging from the topography of Mianchi County, there is Shaoshan Mountain in the north and Laoshan Mountain in the south. The two mountains in the north and south run through the entire territory from east to west, thus forming a long strip of river land that is high in the north and south and low in the middle. This river is the Mianchi River mentioned in "Shui Jing Zhu". As the name suggests, it is named after Mianchi in Sichuan. There are still place names such as Tianchi, Ouchi, Dachiwa, Xiaochiwa, and Chidi in Mianchi County today. Judging from these place names with the word "Chi", we can know that this place was a low swamp in ancient times.

As for where the ancient Mianchi was located in the Mianchi River, "Taiping Huanyu Ji" said: "Mianchi, the name of the ancient pool, was at the place where Qin and Zhao met for alliance." "Yu Gong Zhu" said: "There is a pool in the west of the city. "Of these two theories, one states that the location of Gu Mian is in the west of the city; the other states that the specific location is the place where the alliance will be held. Regarding the place where the alliance will be held, Shi said: "Juli City" (named because the alliance was beneficial to both Qin and Zhao). According to Tang Dynasty Li Jifu's "Yuanhe Prefectures and Counties Map": "Gushui goes south to the county two hundred steps, and east to Qin and Zhao cities. It is commonly known as Juli City. The east city is thirteen miles west of the county, and the west city is ten miles west of the county. Sili is the place where Qin and Zhao met in Mianchi. "According to the "Mianchi County Chronicle": "There is a village named Zhucheng more than ten miles west of the county, which is the ancient Jude City." There are still two ruins in Zucheng Village, namely Dongcheng and Xicheng. . The east city is called Zhaocheng; the west city is called Qincheng. Fragments of tiles and other building materials from the Warring States Period are often found in the site. Near the city site, there are ancient place names such as Mianban (now Nanban), Chidi and Huimengtai. Therefore, the place of ancient Mianchi should be in Chidi Township, west of present-day Mianchi County

Mianchi County is located in the west of Henan Province, with geographical coordinates from 111°33′ to 112°01′ east longitude, and 34°36′ to 34°36′ north latitude. Between 35°05′. Yima City borders Xin'an County to the east, Shaanxi County to the west, Luoning and Yiyang Counties to the south, and the Yellow River to the north and faces Yuanqu, Xia County and Pinglu counties of Shanxi Province across the river. It is 43.5 kilometers wide from east to west and 52.8 kilometers long from north to south, with a total area of ??1,421 square kilometers. The county seat is 170 kilometers away from the provincial capital Zhengzhou and 300 kilometers away from Xi'an.

Mianchi County governs 5 towns, Chengguan, Yinghao, Zhangcun, Hongyang and Tianchi, and 7 townships including Yangshao, Rencun, Guoyuan, Chencun, Potou, Duancun and Nancun. The population is about 330,000.

Rich resources. There are more than 30 kinds of mineral deposits such as coal, aluminum, iron, barite, quartz sand, silica, and refractory clay, and more than 1,300 kinds of wild animal and plant resources. Among them, the proven reserves are more than 3 billion tons, which are of high grade and easy to mine. Transportation is convenient. The domestic railway mileage is 86 kilometers, including 42.6 kilometers of the Longhai Railway, and 1,579.8 kilometers of highway mileage, including 32.6 kilometers of the 310 National Highway. Every village is connected to motor vehicles and there are 8 dedicated railway lines. The Longhai Railway, National Highway 310 and the soon-to-open Luosan Expressway run from east to west, and the Nanyan National Defense Highway runs from north to south. There are 12 ferries including the Bailang Yellow River Cableway Bridge and Nancun in the north, connecting with southern Shanxi.

Mianchi County has a long history and is one of the birthplaces of the Chinese nation. According to the physical remains of Yangshao culture in the county, there were ancient human activities in the Neolithic Age more than 5,000 years ago. The world-famous Yangshao Culture was first discovered in Yangshao Village, Mianchi, by Swedish scholar Anderson. It has been more than 2,000 years since the county was established in the Qin Dynasty, leaving many places of interest. In 1925, Mianchi County began to have activities organized by the Communist Party of China. Mianchi once built an Eighth Route Army depot, ran the West Henan Public School, and experienced the Shangguanzi Ping Rebellion (the subject of the "Western Henan Incident") and the Mapaoquan Incident. The county seat After three liberations, many revolutionary martyrs were buried here, and many revolutionary sites and memorial sites were left in the territory. By the end of 2000, there were more than 110 cultural relics protection units in the county. Among them, 1 is at the national level: Yangshao Village Cultural Site; 6 are at the provincial level: Sigou Site, Lusi Site, Buzhaozhai Site, Fengyicheng Site, Chencun Bridge Preface Monument, and the Eighth Route Army Station; 5 are at the municipal level: Qin Zhao Huimeng Terrace, Liu Clan Monument, Yellow River Water Level Monument, Zheng Kiln Ruins, Zhangba Stone Buddhist Temple; the rest are at the county level. The tourist attractions with development value in Mianchi County include: Shaoshan Mountain, Yunmen Temple, Dazhai Valley, Wamiao Valley, Zhongguan Hanbai, Bailang Cableway Bridge, Huaizhu Water Lifting Project, Tomb of King Zhou Huan, Daimei Zhou Bai, Lijin Customs Garden and so on. In addition to the Mianchi Military Station of the Eighth Route Army, the revolutionary sites also include the former residence of Liu Shaoqi, the site of the expanded cadre meeting of the Western Henan Special Committee of the Communist Party of China, the Anti-Japanese Fallen Soldiers Cemetery, the Anti-Japanese Martyrs Monument, the Yuxue Public School Site, the "Xiaogushan Battle" Memorial Site, The "Mapaoquan Incident" memorial site and other places are good bases for young people to carry out patriotic education. After the Xiaolangdi Reservoir on the Yellow River was impounded, the magnificent scene of "a high gorge emerging from a flat lake" appeared in Nancun, Mianchi County, which created good conditions for the development of Nancun Yellow River Tour and became an important part of the Yellow River Tour in Henan Province. In recent years, the Mianchi County Party Committee and County Government have attached great importance to the development of tourism resources. At the end of 2000, they completed the construction of Nancun Pier and the garden-style renovation project of Yangshao Cultural Heritage.

The ancient Mianchi has attracted many literati at home and abroad, including ancient Wang Tong, Du Fu, Luo Binwang, Wang Anshi, Sima Guang, Wei Yingwu, Ouyang Xiu, Su Shi, Su Che, etc., as well as modern celebrities such as Zhang Shizhao and Wu Bo. Xiao, Yao Xueyin, etc. all left popular poems and essays in Mianchi. There are also some outstanding people in the history of Mianchi: in the Song Dynasty, there was Zhang Qi, a national hero who resisted the Jin Dynasty; in the Ming Dynasty, the great Neo-Confucians Cao Duan and Zhang Xinmin; in the contemporary era, there are Major General Zhang Ruguang, deputy director of the General Logistics Department of the People's Liberation Army, etc.