evidence: North Korea [edit]China and North Korea share a 1,416 km long land border that corresponds almost entirely to the course of the Yalu and Tumen rivers. The two countries signed a border treaty in 1962 to resolve their un-demarcated land border. China received 40% of the disputed crater lake on Paektu Mountain (known as Changbai Mountain in China), while North Korea held the remaining land.[64] [...] The last unresolved territorial issue between the two countries was settled by the 2004 Complementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the China–Russia Boundary.[69] Pursuant to that agreement, Russia transferred to China a part of Abagaitu Islet, the entire Yinlong (Tarabarov) Island, about half of Bolshoy Ussuriysky Island, and some adjacent river islets. The transfer has been ratified by both the Chinese National People's Congress and the Russian State Duma in 2005, thus ending the decades-long border dispute. The official transfer ceremony was held on-site on October 14, 2008.[70] However, in China Standard Map Edition 2023, Bolshoy Ussuriysky Island has been speculated by some journalists to be asserted as Chinese territory by China.[71]