Bohai Sea in the context of "Yantai"

The Yellow River, also known as Huanghe, is the second-longest river in China and the sixth-longest river system on Earth, with an estimated length of 5,464 km (3,395 mi) and a drainage basin of 795,000 km (307,000 sq mi). Beginning in the Bayan Har Mountains, the river flows generally eastwards before entering the 1,500 km (930 mi) long Ordos Loop, which runs northeast at Gansu through the Ordos Plateau and turns east in Inner Mongolia. The river then turns sharply southwards to form the border between Shanxi and Shaanxi, turns eastwards at its confluence with the Wei River, and flows across the North China Plain before emptying into the Bohai Sea. The river is named for the yellow color of its water, which comes from the large amount of sediment discharged into the water as the river flows through the Loess Plateau.

The Yellow River basin was the birthplace of ancient Chinese civilization. According to traditional Chinese historiography, the Xia dynasty originated on its banks around 2100 BC; Sima Qian's Shiji (c. 91 BC) record that the Xia were founded after the tribes around the Yellow River united to combat the frequent floods in the area. The river has provided fertile soil for agriculture, but since then has flooded and changed course frequently, with one estimate counting 1,593 floods in the 2,540 years between 595 BC and 1946 AD. As such, the Yellow River has been considered a blessing and a curse throughout history, and has been nicknamed both "China's Pride" and "China's Sorrow".

The North China Plain (simplified Chinese: 华北平原; traditional Chinese: 華北平原; pinyin: Huáběi Píngyuán) is a large-scale downfaulted rift basin formed in the late Paleogene and Neogene and then modified by the deposits of the Yellow River. It is the largest alluvial plain of China. The plain is bordered to the north by the Yanshan Mountains, to the west by the Taihang Mountains, to the south by the Dabie Mountains, and to the east by the Yellow Sea and Bohai Sea. The Yellow River flows through the plain, before its waters empty into the Bohai Sea.

The part of the North China Plain around the banks of the middle and lower Yellow River is commonly referred to as the Central Plain (pinyin: Zhōngyuán). This portion of the North China Plain formed the cradle of Chinese civilization, and is the region from which the Han Chinese people emerged.

The Kwantung Leased Territory (traditional Chinese and Japanese: 關東州; ; pinyin: Guāndōng zhōu; Wade–Giles: Kuan-tung-chou; rōmaji: Kantō-shū) was a leased territory of the Empire of Japan in the Liaodong Peninsula from 1905 to 1945.

Japan first acquired Kwantung from the Qing Empire in perpetuity in 1895 in the Treaty of Shimonoseki after victory in the First Sino-Japanese War. Kwantung was located at the militarily and economically significant southern tip of the Liaodong Peninsula at the entrance of the Bohai Sea, and included the port city of Ryojun (Port Arthur/Lüshunkou). Japan lost Kwantung weeks later in the Triple Intervention and the Qing transferred the lease to the Russian Empire in 1898, who governed the territory as Russian Dalian and rapidly developed infrastructure and the city of Dairen (Dalniy/Dalian). Japan re-acquired the Kwantung lease from Russia in 1905 in the Treaty of Portsmouth after victory in the Russo-Japanese War, continued to rapidly develop the territory, and obtained extraterritorial rights known as the South Manchuria Railway Zone. Japan extended the lease with the Republic of China in the Twenty-One Demands and used Kwantung as a base to launch the Second Sino-Japanese War. The Kwantung Leased Territory ceased to exist following the Surrender of Japan in World War II in September 1945 when the Soviet Red Army began to administer the region until Kwantung and the Lüshun base was handed over to the People's Republic of China on 16 April 1955.

The Shanhai Pass (simplified Chinese: 山海关; traditional Chinese: 山海關; pinyin: Shānhǎi Guān; lit. 'Mountain Sea Pass') is a major fortified gateway at the eastern end of the Great Wall of China and one of its most crucial fortifications, as the pass commands the narrowest choke point in the strategic Liaoxi Corridor, an elongated coastal plain between the Yan Mountains foothills and the Bohai Sea, which is the only easily traversable landway between North and Northeast China. It is located in present-day Shanhaiguan District, Qinhuangdao, Hebei province, on the east bank of the Shi River, with defensive walls stretching from the Yan Mountains all the way to the shores of the Liaodong Bay.

Throughout Chinese history, garrisons around the pass served as frontline defensive outposts against raids and incursions into the North China Plain by various non-Sinitic ethnic groups from the Northeast (also known as Manchuria since the 19th century), including the Dongyi, Donghu (Xianbei and Wuhuan), Khitan and Jurchen (Manchus). The current Shanhai Pass was built during the early Ming dynasty as the easternmost fortification of the Ming Great Wall, and was extensively reinforced after Yongle Emperor moved the capital from Nanjing to Beijing following the Jingnan campaign, making it the most important defensive barrier in all of China, as it shielded the heartland region around the imperial capital. The pass' strategic location dictated that without mounting a costly direct siege, the only way an invading army can get past the pass' defense was to circumvent it around the north through a few treacherously narrow mountain passes deep within the Yan Mountains, which would make it very difficult to maintain supply lines and thus any sizeable invasions. This defensive significance therefore earned the pass the famous nickname "Greatest Pass Under Heaven" (天下第一关).

Dalian (/dɑːˈljɛn/ dah-LYEN) is a major sub-provincial port city in Liaoning province, People's Republic of China, and is Liaoning's second largest city (after the provincial capital Shenyang) and the third-most populous city of Northeast China (after Shenyang and Harbin). Located on the southern tip of the Liaodong peninsula, it is the southernmost city in both Liaoning and the entire Northeast. Dalian borders the prefectural cities of Yingkou and Anshan to the north and Dandong to the northeast, and also shares maritime boundaries with Qinhuangdao and Huludao across the Liaodong Bay to the west and northwest, Yantai and Weihai on the Shandong peninsula across the Bohai Strait to the south, and North Korea across the Korea Bay to the east.

As of the 2020 census, its total population was 7,450,785 inhabitants of whom 5,106,719 lived in the built-up (or metro) area made of 6 out of 7 urban districts, Pulandian District not being conurbated yet.

The Northeast China Plain (simplified Chinese: 东北平原; traditional Chinese: 東北平原; pinyin: Dōngběi Píngyuán), also known as Songliao Plain, Manchurian Plain, or Northeast Plain, is located in Northeast China. It lies between the Greater and Lesser Khingan and Changbai mountains, ending at the coast at Liaodong Bay in the Bohai Sea. Covering 350,000 km, it is China's largest plain, with an elevation of lower than 200 meters, and less than 100 meters to the southwest. The Songhua, Nen, and Liao Rivers run through the plain.

The Northeast Plain includes Songnen Plain in the north, Liaohe Plain in the south, and Sanjiang Plain in the northeast. The Songnen Plain was formed by the Songhua and alluvial soils from the Nen. The Liaohe Plain, located in the hilly areas near Changchun, was created by the separation of watersheds of the Songhua and Liao, which are collectively known as the Liaohe Plain. The Sanjiang Plain, at the confluence of the Songhua, Amur, and Ussuri Rivers, was originally a swamp known as the "Great Northern Wilderness", becoming a food-producing area after reclamation. The original wetland area of the Sanjiang Plain has been greatly reduced.

Bohai Bay (simplified Chinese: 渤海湾; traditional Chinese: 渤海灣; pinyin: Bóhǎi Wān) is one of the three major bays of the Bohai Sea, the northwestern and innermost gulf of the Yellow Sea. It is bounded by the coastlines of eastern Hebei province (Tangshan and Cangzhou), Tianjin municipality and northern Shandong province (Binzhou and Dongying) south of the Daqing River estuary (which is an old mouth of Luan River in Laoting County) and north of the Yellow River estuary. It is the most southerly water in the Northern Hemisphere where sea ice can form.

The Bohai Bay is the drainage destination of the Hai River and 15 other rivers. Due to these rivers' muddy runoff, the bay used to be a highly silty water body, but extensive damming of the various river systems has greatly diminished siltage. Nevertheless, the Bohai Bay in effect concentrates the runoff of the whole eastern North China Plain, and the Bay is an intensely polluted body of water. Reduced silt deposition and sea level rise are causing problems with sea encroachment in some coastal areas.

The Shandong Peninsula or Jiaodong (tsiaotung) Peninsula is a peninsula in Shandong in eastern China, between the Bohai Sea to the north and the Yellow Sea to the south. The latter name refers its location being to the east of Jiaozhou.

Tianjin is a major international port city in China. It is a direct-administered municipality on the shore of the Bohai Sea making it separate from the surrounding Hebei province. It is one of the nine national central cities, with a total population of 13,866,009 inhabitants at the time of the 2020 Chinese census. Its metropolitan area, which is made up of 12 central districts (other than Baodi, Jizhou, Jinghai and Ninghe), was home to 11,165,706 inhabitants in 2015 and is also the world's 29th-largest agglomeration (between Chengdu and Rio de Janeiro) and 11th-most populous city proper.

Tianjin is governed as one of the four municipalities (alongside Beijing, Shanghai, and Chongqing) under the direct administration of the State Council of China. However, it is the only municipality with a population of less than 20 million. The city borders Hebei Province and Beijing Municipality, bounded to the east by the Bohai Gulf portion of the Yellow Sea. Part of the Bohai Economic Rim, it is the largest coastal city in Northern China and part of the Jing-Jin-Ji megapolis.