Decommissioning a nuclear submarine is a challenge. China’s navy has conducted research on that since 2000. Scientists have worked out detailed plans for dismantling facilities, the disposal of nuclear waste and other key issues.

China is now the second country in the world to have disposed retired nuclear submarines safely.

China's first nuclear-powered submarine, the Long March No 1, was launched in 1970 and was commissioned to the PLA navy in 1974.

The submarine would be used as an exhibit after it is released from military service, according to People's Liberation Army Daily.