Original sentence: As this decision was made solely by Qing dynasty and Japan without any permission from Korea, many people in both North Korea and South Korea and also Joseonjok (numerous Korean residents who still live in Jiandao), view that Gando Convention was an unfair and null negotiation, emphasizing the return of Gando territory back to Korea.Korea became a protectorate of Japan in 1905 after the Eulsa Treaty.Through this, Japan took an advantage of the Korean territories (including Gando/Jiandao) and have handed over Gando territory to Qing dynasty for the exchange of railroad concessions in Manchuria in 4th September 1909, as a result of the Gando Convention
Edited sentence: As one of its first set of attempts to annex northeast China, Japanese forces in Korea invaded Jiandao in 1907.But Japan withdrew its invading troops back to Korea in 1909 and recognized the border that was present along Tumen River before the invasion, under the diplomatic pressure from China.North Korea and South Korea recognize the region as a part of the People's Republic of China, but there are some nationalist elements in South Korea that endorse the idea that the region should be a part of modern-day Korea.These groups claim what happened in Jiandao in 1909 (Japan's invasion and subsequent withdrawal) was a "transfer" of "Korean territory" between Japan and China