TIANJIN, Sept. 1 (Reuters) - Chinese President Xi Jinping urged leaders at a regional summit to leverage their “mega-scale market” on Monday, while Russian President Vladimir Putin showed support for Xi’s ambition for a new global security and economic order that poses a challenge to the United States.

The Shanghai Cooperation Organization (SCO) has set a model for a new type of international relations, Xi said in opening remarks addressing more than 20 world leaders at a two-day summit held in northern China’s port city Tianjin.

“We should advocate for equal and orderly multipolarization of the world, inclusive economic globalization and promote the construction of a more just and equitable global governance system,” he said.

“We must take advantage of the mega-scale market... to improve the level of trade and investment facilitation,” said Xi, urging the bloc to boost cooperation in fields including energy, infrastructure, science and technology, and artificial intelligence.

Putin said the grouping has revived “genuine multilateralism” with national currencies increasingly used in mutual settlements.