Original sentence: Historians have traditionally viewed Goguryeo as a Korean state, one of the Three Kingdoms of Korea.The Chinese have traditionally viewed Goguryeo as a Korean state that engaged in the territorial competition with the Han China in the Northeast.The accepted position among Chinese government historians therefore became that the history of Goguryeo before the capital was transferred to Pyongyang in the Korean Peninsula, or even until its collapse, was to be considered part of Chinese history, a regional power of China.The motive for such actions is widely speculated and criticized in other East Asian countries (namely North Korea, South Korea, and Mongolia), but often includes theories that the PRC government may be willing to solidify its current borders and prevent unrest among ethnic minorities within China through perceived historical validity, which could be fostered by a claim that current Chinese territory has indeed always been Chinese
Edited sentence: Many mainstream Historians view Goguryeo as a Korean state, one of the Three Kingdoms of Korea.The Chinese have also traditionally viewed Goguryeo as a Korean state that engaged in the territorial competition with the Han China in the Northeast.The accepted position among Chinese revisionist government historians therefore became that the history of Goguryeo before the capital was transferred to Pyongyang in the Korean Peninsula, or even until its collapse, was to be considered part of Chinese history, a regional power of China.The motive for such actions is widely speculated and criticized in other East Asian countries (namely North Korea, South Korea, and Mongolia), but often includes theories that the PRC government may be willing to solidify its current borders and prevent unrest among ethnic minorities within China through perceived historical validity, which could be fostered by the false claim that current Chinese territory has always been Chinese