Because G20 members account for 86 percent of global GDP and their trade volume accounts for almost 80 percent of the world's total, Gao said by working with other members, China hopes to demonstrate a cohesive and constructive dialogue on worldwide trade as a driving force for sustainable development.
A summit of the world's top economies will open on Friday with leaders struggling over fallout from a US-China trade war that has roiled global markets and bracing for the kind of divisive geopolitical drama that President Donald Trump often brings to the worldwide stage.
That had led to greater confidence among some advisers that Saturday's dinner with Xi could produce a breakthrough, even though no official has been willing to explicitly say they expect the two men to come to an agreement.
The key issue there will be the nations' trade tariffs dispute. "We call on all members to oppose such WTO-inconsistent measures, stand by their commitments undertaken in the WTO".
In addition to the 10 percent tariffs already targeting US$250 billion worth of Chinese imports, the Trump administration is poised to increase the tariff rate from 10 percent to 25 percent on January 1 if "China fails to address USA demands".
US stocks seesawed between slight gains and losses on Friday, as investors kept away from making big bets ahead of Saturday's talks. "Nobody does", he said on Friday. He later told reporters that the meeting was handled in a cordial matter.
"We've been going through some hard times, and your support, and your support for the deal with the International Monetary Fund, has helped us build a better future and start taking steps in that direction".
"You've done a lot of the things that they've wanted over there and that's why you're sitting right here". I think we'd like to.
Russian Federation air strikes hit rebels in Syria's Aleppo after 'gas attacks'
On Twitter he wrote that "the regime and its allies are using this as an excuse to launch a military operation in north Syria". He said the symptoms included red eyes, heart palpitations and difficulty breathing.
Other leaders with whom he will speak in bilateral meetings include Indian Prime Minister Narendra Modi, German Chancellor Angela Merkel, Japanese Prime Minister Shinzo Abe, South Korean President Moon Jae-in and Turkish President Recep Tayyip Erdogan.
There is massive security for the summit in Buenos Aires, with a bank holiday declared for Friday and the city's main business district shut down.
Earlier this month, officials from countries attending a major Asia-Pacific summit failed to issue a joint statement for the first time after the US delegation clashed with China over trade and security.
White House press secretary Sarah Huckabee Sanders, who had accompanied Trump to the breakfast meeting with Argentina's President Mauricio Macri on Friday morning, said at the end of the meeting that Argentina's views were in line with Trump's regarding China's trade practices.
Mrs May's presence at the talks between world leaders is likely to be dominated by the issue of Brexit and the UK's future global trade as it prepares to leave the European Union in March 2019.
The pair discussed trade, co-operation in the Pacific, and the security situations in Iran and North Korea.
The meeting comes 36 years after the 1982 war, and this week the two governments announced a new agreement on an additional air link between South America and the Falkland Islands, via Argentina.
President Donald Trump is blasting the investigation in which his former lawyer pleaded guilty to lying to Congress about a Moscow real estate deal he pursued for Trump during the 2016 presidential campaign.
Jose Mourinho - Manchester United need to handle pressure at home matches
UEFA fined United €15,000 (£13,000) for their late arrival and the subsequent delayed kick-off of their match against Valencia in October. "I don't think it was really aimed as much at us as individuals".
Trump himself has cast the meeting as a do-or-die encounter that will either result in a deal or an escalation in the trade war.
Prince Mohammed was greeted warmly by Russian President Vladimir Putin.
Prince Mohammed arrived under swirling controversy over the murder of Saudi journalist Jamal Khashoggi in the Saudi consulate in Istanbul on October 2.
Argentine legal authorities are now considering a request from Human Rights Watch to prosecute bin Salman for alleged crimes against humanity.
Faurie, the Argentine foreign minister, said the recent establishment of more flights to the disputed islands was a positive development.
French President Emmanuel Macron held a five-minute exchange with the crown prince during which, a French official said, Mr Macron had conveyed "very firm" messages over the Khashoggi affair.
Oil markets will also be closely watching a bilateral meeting between Putin and Crown Prince Mohammed on Saturday afternoon for any sign of a breakthrough in a deal for Russian Federation to participate in a production cut by the OPEC oil cartel next month.
In threat to Pelosi, 16 Dems say they'll back new leadership
Two of them, Anthony Brindisi in NY and Ben McAdams in Utah, are in races that have not yet been called by The Associated Press. Elijah Cummings, D-Md., the incoming House Oversight Committee chairman and a CBC member, said on CBS News' "Face the Nation".