Warning that "unilateralism, trade protectionism and a backlash against globalisation are taking new forms", Xi spoke up for the "pursuit of cooperation for mutual benefit".
While never mentioning the United States by name, he added: "We should reject the Cold War mentality and confrontation between blocs, and oppose the practice of seeking absolute security of oneself at the expense of others, so as to obtain security of all." Xi, whose government is locked in tough negotiations with the United States to avoid a trade war, said World Trade Organisation rules and the multilateral trading system should be upheld to build an open world economy.
"We should reject self-centred, shortsighted and closed-door policies," said Xi, whose own country has been accused of restricting broad access for foreign firms to its huge market.
While Xi feted his peers with fireworks, SCO members have their own disagreements, with India concerned about China's trade infrastructure project in disputed territory in arch-rival Pakistan. China and India had their own heated border dispute in the Himalayas last year.
The show of unity was in stark contrast to the calamitous end to the Group of Seven meeting in Quebec City, after US President Donald Trump disowned a joint summit statement and lambasted Canadian Prime Minister Justin Trudeau as "dishonest" and "weak".
In Qingdao, Xi touted security cooperation -- the original raison d'etre of the SCO -- and announced that China would open a 30 billion yuan ($4.7 billion) special lending facility within the bloc's interbank consortium.
Putin said trade and investment among SCO countries was growing and Russia and China would propose a Eurasian economic partnership for all member states.
The US withdrawal, he said, "can further destabilise the situation" but Russia is in favour of the "unconditional implementation" of the pact.
For his part, Rouhani said the "US effort to impose its policies on others is an expanding danger".
Rouhani said the US was monitoring the global reaction to its withdrawal from the nuclear deal, and a weak response would encourage it to carry on acting unilaterally.
"This will have many harmful consequences for the global community," he said.
The Iranian president said his country was ready to cooperate with the SCO against terrorism, extremism and separatism.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)