Tangshan City, referred to as "Tang" for short, is a prefecture level city under the jurisdiction of Hebei Province. It is located in the east of Hebei Province and the northeast of North China Plain, bordering the Bohai Sea in the south, Yanshan Mountain in the north, and Beijing Tianjin. It is located at the throat of the North China and Northeast Passage, between 117 ° 31 ′ -119 ° 19 ′ E and 38 ° 55 ′ -40 ° 28 ′ N, with a total area of 13472 square kilometers. As of June 2023, Tangshan City governs 7 municipal districts, 4 counties, and 3 county-level cities, and has 4 development zones. As of the end of 2023, the permanent population of Tangshan City was 7.7195 million， sports fitness  .

Tangshan was named after Emperor Taizong Li Shimin's stay in Goguryeo during his expedition to the east, and is known as the "Northern Porcelain Capital". It is a provincial sub center city, a third tier city, a type II large city, one of the central cities of Hebei Province approved by the State Council, a new industrialization base and port city in the Bohai Rim region, and a part of the China (Tangshan) Cross border E-commerce Comprehensive Pilot Zone and China (Hebei) Free Trade Pilot Zone. National Agricultural Product Quality and Safety City. The first mechanized coal mining mine in China, the first standard gauge railway, the first steam locomotive, and the first bucket of machine made cement were born here. Tangshan is the birthplace of Chinese Pingju, known as the "Three Flowers of Jidong" for its shadow puppets, Pingju, and Leting drums, and is a national intangible cultural heritage.

In 2023, Tangshan City achieved a regional GDP of 913.33 billion yuan, of which the added value of the primary industry was 65.52 billion yuan, the added value of the secondary industry was 466.00 billion yuan, and the added value of the tertiary industry was 381.8 billion yuan. The value-added structure of the three industries is 7.2:51.0:41.8. The per capita regional GDP of the city is 118418 yuan.

geographical environment

Location domain

Tangshan City is located in the central area of Bohai Bay, in the eastern part of Hebei Province. It faces Qinhuangdao City across the Luan River to the east, Tianjin City to the west, Bohai Sea to the south, and Chengde City across the Great Wall to the north. Between longitude 117 ° 31 ′ -119 ° 19 ′ E and latitude 38 ° 55 ′ -40 ° 28 ′ N, it is approximately 130 kilometers long from east to west and 150 kilometers wide from north to south, with a total area of 13472 square kilometers. 125 kilometers east of Qinhuangdao, 40 kilometers south of Bohai Sea, 108 kilometers southwest of Tianjin, 366 kilometers to the provincial capital Shijiazhuang, and 154 kilometers northwest of Beijing.

geological structure 

There are many stratigraphic sequences in Tangshan City, with the Archean and Proterozoic mainly exposed in the northern mountainous areas; The Cambrian and Ordovician systems are mainly distributed on the two wings of the Kaiping syncline; The majority of the Carboniferous and Permian strata are hidden in the southern plain area; A small amount of Jurassic is exposed in the Lianhuayuan and Guantou Mountain areas of Qian'an County; The third series is found in the Xinzhuang Yinzhuang area south of Qianxi County and is deeply buried in the area south of the Xugezhuang Luannan County Changning line in Fengnan District; The Quaternary system is highly developed, with a distribution area accounting for about 3/5 of the total area of the city, forming a vast sloping plain in front of the mountains.

In terms of geological structure, the jurisdiction is located at the junction of the southern edge of the eastern section of the Yanshan wrinkled belt on the Sino Korean quasi platform and the Huanghua Depression in the North China Depression. From the perspective of geomechanics, it belongs to the intersection of the latitudinal structural system, the New Huaxia structural system, and the eastern wing reflection arc of the Qilu Heshan shaped structure, and the structural state is quite complex. The Yanshan Movement shaped the main structural framework of the jurisdiction. After experiencing strong tectonic differentiation during the Himalayan Movement, since the Late Tertiary, the inheritance in the north has increased while that in the south has decreased. Along with the rise and fall of the north-south difference, many Cenozoic faults have developed in the entire region, with the majority of them being high angle normal faults in the coverage area. Such as the Hugezhuang Fault, which was active in the Early Tertiary and relatively stable since the Late Tertiary, the Hanjiazhuang South Fault, which was inherited from the Late Tertiary and Quaternary, as well as the Hanjiazhuang Shaheyi Fault, Douhe Fault, and others with good Quaternary