Bohai Strait in the context of "Yantai"

Northeast China (Chinese: 东北; pinyin: Dōngběi) is a geographical region of China, consisting officially of three provinces Liaoning, Jilin and Heilongjiang. The heartland of the region is the Northeast China Plain, the largest plain in China with an area of over 350,000 km (140,000 sq mi). The region is separated from the Russian Far East to the north and east by the Amur, Argun and Ussuri Rivers; from North Korea to the south by the Yalu and Tumen Rivers; and from the neighboring North China to the west by the Greater Khingan Range and Yan Mountains. It is also bounded by the Bohai Bay and Yellow Sea to the southwest, about 100 km (62 mi) away from East China's Jiaodong Peninsula across the Bohai Strait, due to be connected via a proposed undersea tunnel.

The four prefectures of Inner Mongolia (which is part of North China) east of the Greater Khingan, i.e. Chifeng, Tongliao, Hinggan and Hulunbuir, are sometimes also considered broader parts of Northeast China, and together with the aforementioned three provinces formed what was historically known as Inner Manchuria, in contrast to the Outer Manchuria (or "Outer Northeast" in Chinese literatures) annexed by the Russian Empire during the mid-19th century.

38°18′N 120°54′E / 38.3°N 120.9°E / 38.3; 120.9 (Bohai Strait)

The Bohai Strait Tunnel or Dalian-Yantai Tunnel is a proposed undersea tunnel construction project across the Bohai Strait to connect Dalian on the Liaodong Peninsula with Yantai on the Shandong Peninsula. The official name for the project is Bohai Strait Cross-Sea Corridor (Chinese: 渤海海峡跨海通道).

Changdao County (simplified Chinese: 长岛县; traditional Chinese: 長島縣; pinyin: Chángdǎo Xiàn; lit. 'Long Island County') was a county in Yantai, a prefectural area of Shandong in the People's Republic of China. It consisted of the Changshan Islands within the Bohai Strait, directly north of Penglai. They are known for their sandy beaches and picturesque limestone cliffs. The total land area measured 56 square kilometers (22 sq mi) and the coastline 146 km (91 mi). The population in 2020 was 40,898. In 2020, Changdao County was merged into the county-level city of Penglai and became Penglai District.