Portal:China/Anniversaries/May/May 31
- Events
- 1924 – The Soviet Union signs an agreement with the Beijing government, referring to Outer Mongolia as an "integral part of the Republic of China", whose "sovereignty" therein the Soviet Union promises to respect.
- Deaths
- 1989 – Owen Lattimore, American author, educator, and influential scholar of China and Central Asia, especially Mongolia (b. 1900)