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

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.

In a conversation with Soviet ambassador Yudin, Mao sees a prohibition of the use of hydrogen weapons as very likely, as the capitalist countries "[fear] fighting this kind of war." Further, he notes that the socialist countries have an advantage over Western ones in terms of conventional army size.

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.

A letter to Zhou Enlai informing him that the industrial development plan for China's atomic energy program has not been finalized and that the technical agreement with the Soviet Union must be delayed.

A Chinese Central Committee circular stresses the need for China to develop a healthy uranium prospecting and mining industry, and to transfer technical and administrative cadres to work with Soviet experts.