Northeast China, historically known in English as Manchuria, is a geographical region of China, consisting of the three provinces of Liaoning, Jilin and Heilongjiang. The region is sometimes called the Three Northeast Provinces (东北三省/東北三省; Dōngběi sānshěng). It is separated from Russia largely by the Amur, Argun, and Ussuri rivers, from North Korea by the Yalu River and Tumen River, and from the Inner Mongolian Autonomous Region by the Greater Khingan Range. The heartland of the region is the Northeast China Plain.

In the context of the Northeast China Revitalization strategy of the State Council, five eastern prefectures of Inner Mongolia are also defined as part of the Northeast: Xilin Gol, Chifeng, Tongliao, Hinggan and Hulunbuir. The region is nearly congruent with some definitions of "Manchuria" in historical foreign usage.

Another term for the area is Guandong (关东/關東; Guāndōng) meaning "east of the gate," referring to the gate at Shanhaiguan. This name was also used by the Japanese to their leased territory of Dalian, as Kwantung Chou, and its Kwantung Army which was later mobilized to set up the puppet state of Manchukuo in Northeast China.

China (ⁱ/ˈtʃaɪnə/; Chinese: 中国; pinyin: Zhōngguó; see also Names of China), officially the People's Republic of China (PRC), is the world's most-populous country, with a population of over 1.3 billion. Covering approximately 9.6 million square kilometres, the East Asian state is the world's second-largest country by land area, and the third- or fourth-largest in total area, depending on the definition of total area.

The People's Republic of China is a single-party state governed by the Communist Party of China. It exercises jurisdiction over 22 provinces, five autonomous regions, four directly controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau). Its capital city is Beijing. The PRC also claims Taiwan—which is controlled by the Republic of China (ROC), a separate political entity—as its 23rd province, a claim controversial due to the complex political status of Taiwan and the unresolved Chinese Civil War. The PRC government denies the legitimacy of the ROC.

Song In (in hangul 송인, in hanja 宋仁) was a civil official in the mid-Goryeo era who became the intermediary founder of the Jincheon Song clan. His highest post was munha pyeongjangsa (문하 평장사). This was the highest government position in the period. Song In was responsible for administration, judicial affairs and economy in the district.

As he performed meritorious deeds during the King, he was conferred with Chanhwagongsin and Jincheonbaek. Baek was a position of politicians who were responsible for administration, judicial affairs and economy in the district. As the government created him Jincheonbaek, his family started regarding Jincheon as their origin. Hence, the family origin became Jincheon Song.

When he was in the position of Sangsanbaek, he tried to be just and fair in all the administrative affairs and strived to enhance the welfare of his people. He also focused on education for the youth and courtesy for people, which made his district famous for most excellent behaviors in the nation. After that, the people have long paid tribute to his feats.