Xi made the remarks at an informal leaders' meeting of the BRICS, which groups Brazil, Russia, India, China and South Africa, ahead of a Group of 20 summit in the German port city of Hamburg, China's state-run Xinhua news agency reported.
He pressed the BRICS members to unswervingly build an open world economy, champion multilateralism and promote common development.
The BRICS leaders exchanged views on the current international political and economic circumstances and the G20's priorities, and reached important agreements on strengthening BRICS unity and coordination, jointly improving global economic governance and promoting sustainable development, the report said.
The Xinhua report did not elaborate on what Xi meant by "regional disputes".
Apart from Prime Minister Narendra Modi and President Xi, the meeting was attended by Brazilian President Michel Temer, Russian President Vladimir Putin and South African President Jacob Zuma.
The leaders, including Prime Minister Narendra Modi, pledged to work together for positive results at the BRICS summit in the southeastern Chinese seaside city of Xiamen later this year.
China is also engaged in hotly contested territorial disputes in both the South China Sea and the East China Sea. Beijing has built up artificial islands and militarised many of them.
Both the South China Sea and the East China Sea areas are stated to be rich in minerals, oil and other natural resources. They are also vital to global trade.
China also lays claim to tiny islands in the East China Sea between Japan and the Korean peninsula, and between Japan and Taiwan.
The US today said it has flown two bombers over East Asian waters, as tensions continue to run high in the region. The B-1B Lancers took part in joint military drills with Japan in the East China Sea, the US Air Force said in a statement. They bombers then flew over the highly contentious South China Sea.
The US had also recently sent a navy warship near an artificial island in the South China Sea as part of the first "freedom of navigation" operation under President Donald Trump.
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