SHANGHAI - Former Australian Prime Minister Kevin Rudd said the world is expecting the success of upcoming Group of 20 (G20)?Hangzhou summit, which will be significant for the recovery of global economy.

G20 is a core part of world governance and is needed to boost global economic growth, Rudd said as he released a report of the Independent Commission on Multilateralism in Shanghai on Thursday. He chairs the institution.

The global economy has not recovered, he said, adding that he hoped the summit will result in new policy matters to lift global economy from slow growth into sustainable and strong growth.

He stressed China's irreplaceable role in finding solutions to global growth problems during the summit.

The summit is scheduled to be held on September 4-5 in China's eastern city of Hangzhou.

In his report, Rudd called for the United Nations to respond to the challenges of the international community.