東北工程は日本との領土争いされている土地の歴史について研究した？
The Goguryeo controversies are disputes between China and both Koreas (North and South Korea) on the history of Goguryeo, an ancient kingdom (37 BC – 668 AD) located in present-day Northeast China and two thirds of the Korean Peninsula. At the heart of the Goguryeo controversy is whether Goguryeo is a part of Chinese history exclusively, Korean history exclusively, separate from both, or shared by all. During the 1980s, Chinese scholarship was liberated from the strictures of the Maoist era, and social scientists began studying the history of Goguryeo, challenging the conventional view that Goguryeo was exclusively part of Korean history. Goguryeo, which is the origin of the English name "Korea", is seen as foundational in Korean identity; and the territory of China is held as sacrosanct.
no