The Chinese Government endorses a proposal by the Soviet Union for the USSR, the US, and the UK to halt nuclear weapons tests.

The Chinese Embassy in Moscow reports responses to the second Chinese nuclear test among Soviet news agencies, upper and middle class citizens, and students.

The Chinese Embassy in Moscow reports reactions from students and military personnel in the USSR to China's second nuclear test.

Cable from the Chinese Embassy in the Soviet Union describing positive responses of Soviet officials and the foreign missions regarding China's second successful nuclear test.

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 Chinese Embassy in Tirana notes Albania's positive responses to China's successful nuclear test.

The Joint Institute for Nuclear Research discusses plans for scientific research and development from 1966 through 1970, and Chinese representatives announce their plan to withdraw from the Joint Institute on 1 July, 1965

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 letter from the Chinese Vice Minister of Foreign Affairs to the Soviet Chargé informing him that revisions must be made to the “Agreement on the Provision of Technical Assistance from the Union of Soviet Socialist Republics to the People’s Republic of China in Establishing an Atomic Energy Industry,” and that until it is revised the delivery of technical equipment should be delayed.