"Should there be any other aspirations, such as taking advantage of the trade spat to throttle Chinese growth, then an agreement is unlikely to be reached", the newspaper said in an editorial.
Trump said Thursday: "I like the deal we have now".
People holding flowers and an orchestra met Xi upon his landing in the Argentinian capital.
But the skilled labor force necessary for iPhone assembly doesn't exist in the U.S., CEO Tim Cook has said.
"Now, trade, climate, migrants, refugees, multilateralism, steel - which are really the thorny issues - remain without agreement". But the divisions on the final communique have only highlighted how fractured the grouping has become on key global issues.
"I will tell you that I think China wants to make a deal", he continued.
"The G20 today is more of a standards setting body for global economic policy in different domains, such as energy security, trade and cyber security". Wall Street edged lower on Thursday amid jitters over Trump's meeting with Xi.
"The G-20 members, accounting for 86 per cent of global GDP and 80 per cent of aggregate trade volume, should continue to expand worldwide economic cooperation and improve macro policy coordination", said Mr Ruan Zongze, executive vice-president of the China Institute of worldwide Studies.
The Donald Trump administration's strict stance on reaching trade parity with trading partners is expected to bring neighbours India and China closer on the global stage, senior government officials said.
Overshadowing Trump's comments was a report that White House economic advisor and China trade hawk Peter Navarro would be attending the Trump-Xi dinner.
The United States slaps a 2.5 percent tariff on imported cars but for China the duty was raised by 25 percentage points in July as part of countermeasures against the alleged theft of intellectual property and technology by the country.
The United States has levied additional duties of between 10 per cent and 25 percent on $250 billion (Dh918.12bn) of Chinese goods this year as punishment for what it calls China's unfair trade practices, with the 10 per cent tariffs set to rise to 25 per cent next year. China has responded with its own tariffs. Apart from the meeting with the U.S. president, Xi is expected to hold negotiations with Argentina's President Mauricio Macri, Russian President Vladimir Putin and other world leaders. Trump abruptly announced he was canceling their planned bilateral talks, citing Russia's seizure of Ukrainian vessels, shortly after he departed Washington for Buenos Aires. It is their only scheduled meeting before the end of the year.
Roughly an hour earlier, he had told reporters he would probably meet with Putin at the summit and said it was "a very good time to have the meeting".
"In relation to Mr Khashoggi, we want to see a full and transparent investigation of what happened and those responsible being held to account", she said.
President Mauricio Macri said the slogan of the summit is a "fair and sustainable future" with a focus on "putting people first" and "building consensus". Saudi Arabia has said the prince had no prior knowledge of the murder.
Nonetheless, French president Emmanuel Macron, who flew into Buenos Aires on Wednesday, clung to the importance of the ideal of cooperation that the G20 represents.