Gromyko informs Liu Xiao of the Soviet position and strategy in its negotiations with the United States and the United Kingdom for halting nuclear tests.

The Soviet Central Committee informs their Chinese counterparts that, in light of the arms reduction talks taking place in Geneva, Soviet nuclear assistance must cease. The Chinese had requested a sample atomic bomb and technical data, but the Soviet feared that doing so would imperil the efforts of the socialist countries in Geneva.

Khrushchev writes to Zhou outlining the Soviet Union's argument for the need to halt the testing of atomic weapons, and urges the Chinese to support and agree to the ban.

A memorandum from the Soviet government to the Chinese updating them on the arms reduction talks, a key component of which was a prohibition of the testing of atomic and hydrogen weapons. The Soviet proposal also called for reductions in conventional weapons and the prohibition of installing nuclear weapons outside their territorial borders.