Does Tangshan belong to a big city

Tangshan is a big city with a population of 7.6 million. Cities with a permanent population of more than 6,543,800 and less than 5 million are big cities. Among them, cities with urban permanent population of 3 million to 5 million are I-type big cities, and cities with urban permanent population of1000 to 3 million are II-type big cities. The climate of Tangshan belongs to warm temperate zone and semi-humid continental monsoon climate.

Tangshan is windy and rainy in spring, with large evaporation, dry air and drought. The temperature rises rapidly, and you can usually smell thunder in late March. Summer is hot and humid, with concentrated rain, and there are many disastrous weather such as rainstorm, hail, thunderstorm and strong wind. It is sunny in autumn, the temperature changes greatly, the temperature drops quickly, the wind speed is low and the air is fresh. In winter, the weather is cold and dry, the precipitation is scarce, and the wind blows from west to northwest.

Geological structure of Tangshan city;

There are many stratigraphic sequences in Tangshan city, and Archean and Proterozoic are mainly exposed in the northern mountainous areas. Cambrian and Ordovician are mainly distributed in the two wings of Kaiping syncline; Most of Carboniferous and Permian are hidden in the southern plain. There are a few Jurassic outcrops in Lianhuayuan and Guantou Mountain in Gan 'an County.

Geologically, the jurisdiction is located at the junction of the southern edge of the eastern section of Yanshan skirt fold belt of China-Korea paraplatform and Huanghua Depression of North China Depression. From the viewpoint of geomechanics, it belongs to the intersection of banded structural system, Neocathaysian structural system and the reflex arc of the east wing of Qilu-Heshan structure, and its structural state is quite complicated. Yanshan movement shaped the main structure skeleton of the jurisdiction. After experiencing the strong structural differentiation of Himalayan movement, the inheritance in the north has been strengthened and the inheritance in the south has been weakened since the Late Tertiary.

Above content reference: Baidu Encyclopedia-Tangshan City