The SCO is a political, military and economic alliance that includes China, Kazakhstan, Kyrgyzstan, Russia, Tajikistan, and Uzbekistan. The alliance has been holding annual summits since 1996.
The Indian prime minister will also visit Tajikistan, Turkmenistan, and Kyrgyzstan before returning to Delhi.
Mongolia, Iran, India, Pakistan, and Afghanistan have observer status. In September 2014, Pakistan and India formally applied to join the alliance.
In early June, Pakistan's ambassador to Russia told Sputnik that the SCO Council of Foreign Ministers had decided to grant India and Pakistan the status of full members of the bloc, which is to be confirmed at the SCO summit in July.