20 Rare Images of Chinese Nuclear Tests during the Sixties

Since the late ’50s, China launched its program to become the fifth nuclear power, a goal reached in 1964 with test 596.

China began its nuclear weapons program in the late 1950s, driven by geopolitical tensions and the desire to assert its position as a global power. The project gained momentum under the leadership of Mao Zedong and was seen as crucial for China’s national defense, especially following conflicts such as the Korean War and deteriorating relations with the Soviet Union. The Soviet Union initially provided technical assistance to China’s nuclear program, but by 1960, this cooperation ceased as the Sino-Soviet split deepened. Despite the withdrawal of Soviet support, China continued its efforts independently.

On October 16, 1964, China successfully detonated its first nuclear bomb in a test known as Test 596 at the Lop Nur test site in Xinjiang. This test marked China’s entry into the nuclear club, making it the fifth country in the world to possess nuclear weapons, after the United States, the Soviet Union, the United Kingdom, and France. The bomb was a uranium-235 fission device with an estimated yield of 22 kilotons.

Following Test 596, China embarked on a series of nuclear tests throughout the 1960s and 1970s, as it worked to develop and improve its nuclear arsenal. These tests were designed not only to refine the design of nuclear weapons but also to evaluate their effects on various targets. Experiments were conducted on animals, tanks, planes, and trains to simulate battlefield conditions and understand the impact of nuclear detonations on military hardware and living organisms.

Between 1964 and 1996, China conducted 45 nuclear tests, with the most powerful test being in 1976, yielding approximately 4 megatons. These tests ranged from atmospheric explosions to underground detonations as China transitioned to safer testing methods in response to growing international pressure for nuclear test bans.

China’s final nuclear test took place on July 29, 1996, after which the country declared a moratorium on nuclear testing. Shortly thereafter, China signed the Comprehensive Nuclear-Test-Ban Treaty (CTBT) in 1996, although the treaty has not yet entered into force due to the lack of ratification by key nations, including the United States.

Despite not conducting nuclear tests since 1996, China has continued to modernize its nuclear arsenal. The country maintains a no-first-use policy, meaning it commits to not using nuclear weapons unless first attacked by an adversary using such weapons. However, China has invested heavily in improving its missile technology, developing intercontinental ballistic missiles (ICBMs), submarine-launched ballistic missiles (SLBMs), and hypersonic missiles.

As of mid-2024, China’s nuclear arsenal comprises over 600 operational nuclear warheads, reflecting a significant expansion from previous years. This growth trajectory suggests that China is moving beyond a minimal deterrence posture, which traditionally emphasized maintaining a limited number of nuclear weapons sufficient solely for retaliatory purposes. Projections indicate that China’s stockpile could reach approximately 1,000 warheads by 2030. This expansion is accompanied by efforts to enhance the survivability and second-strike capability of its nuclear forces, including the development of more secure and advanced delivery systems.