They have a giant land border. An adversarial Russia-China relationship is expensive for both powers, and is a major reason for the USSR going bankrupt in the cold war (also the USSR propping up Vietnam after China invaded in 79).
They have a giant land border. An adversarial Russia-China relationship is expensive for both powers, and is a major reason for the USSR going bankrupt in the cold war (also the USSR propping up Vietnam after China invaded in 79).