The Trump administration is making that position look increasingly untenable.
US Vice President Mike Pence later told the summit in Port Moresby that Washington would not change its approach until Beijing changes its own trade policies.
"The US will not change course until China changes its ways".
Pato also confirmed to Reuters that Chinese officials had see him on Saturday over the communique, adding they were refused because they had not made "necessary arrangements" for a meeting, but denied media reports they had barged into his office.
The summit failed to issue a closing communique after the United States and Beijing furiously disagreed over the wording of trade issues, leaving a cloud of uncertainty and bitterness, and strained relations in our own backyard. Xi has retaliated with duties on $110 billion in US imports.
But that should not be seen as unequivocal siding with the USA in its rivalry with the world's next-largest and fastest-growing economy.
"History has shown that confrontation, whether in the form of a cold war, a hot war or a trade war, will produce no winners", Xi said in his speech in Port Moresby.
Meanwhile, the United States suspects China harbours an ambition to rewrite global trade rules for its own purposes, a project which, if true, would be assisted by President Trump's withdrawal from the Trans-Pacific Partnership recently ratified by New Zealand and other Pacific Rim countries.
Instead, Papua New Guinean Prime Minister Peter O'Neill - who is the chair - will issue a chairman's statement.
"And we shouldn't be pretending that they do". "I said China is already in possession". "China and the U.S will try very hard in the next few years to charm the countries in the region".
Quedan definidos los cuartos de final de la Liga MX Femenil
El jueves 22 de noviembre a las 19:00 horas, Monterrey Femenil le hará los honores al Rebaño en el Estadio BBVA Bancomer . Las de San Nicolás de los Garza se enfrentarán a las rojinegras del Atlas , que quedaron octavas en la tabla general.
The U.S., Japan, New Zealand and Australia said they'll bring electricity to 70 percent of Papua New Guinea's people by 2030, boosting the West's response to growing Chinese influence in the South Pacific.
Australia and the USA will also jointly expand the Lombrum naval base on Manus Island, opening up a key staging point into the contested South China Sea.
Pence also had stinging remarks for Xi's Belt-and-Road Initiative, which Morgan Stanley says may total $1.3 trillion by 2027 - dwarfing the funds the US and allies have mobilized. The vice president said the US doesn't "drown our partners in a sea of debt" or "offer a constricting belt or a one-way road".
Compared with Pence, Xi had a softer message for Asia this week. "We have to watch how the situation unfolds", he said.
"As the tension with US has risen, China's approach to its neighboring countries has changed", said Shi Yinhong, an global relations professor at Renmin University in Beijing. "China would like to gain as many friends as it can at the moment".
After APEC, Xi is due to visit Brunei and the Philippines, a US ally that has moved closer to China under Rodrigo Duterte.
Japanese Prime Minister Shinzo Abe failed in his efforts to bridge the deep U.S.
The minister himself sought to downplay the incident, saying: "There wasn't an issue".
"Great power competition between the United States and China in this region doesn't have to mean hostility", Pence said. "These issues can be resolved, we believe, at the negotiation table".
The meeting, held at a time when the regional economy is facing both opportunities and challenges, has pushed forward the practical cooperation in various fields within the APEC framework, Wang Xiaolong, director-general of the Department of International Economic Affairs of China's Foreign Ministry, told the press.