"President Trump will participate in tomorrow's virtual APEC Summit", the official told AFP.
At a key meeting last month, Xi and other leaders laid out a blueprint for China's five-year plan and key objectives for the next 15 years.
Providing he shows up - Trump is strongly inclined to last-minute changes of plan - the president's attendance at the APEC Economic Leaders' Meeting likely marks his last flourish on the worldwide stage as president, following his defeat by Democrat Joe Biden at the presidential election on November 3.
"We will continue to advance the trade and investment liberalisation and facilitation, to conduct negotiations with more countries on high standard free trade agreements and actively engage in bilateral, multilateral and regional mechanism for trade and investment cooperation, so as to build a higher standard and open economy".More news: California Medical Association officials attended French Laundry dinner party with Gavin Newsom
He also said Japan aims to foster free trade in the Asia-Pacific through full implementation of the Trans-Pacific Partnership trade deal.
The Trump administration has been criticised for a lower level of engagement in Asia.
The creation of the RCEP leaves the US sitting outside Asia's two main free trade pacts.
Mr Trump pulled the U.S. out of the Trans-Pacific Partnership trade pact, the predecessor to CPTPP.More news: The 'lie' that triggered South Australia's lockdown
Xi also called for stronger policy coordination among global communities and said globalisation is "irreversible" and that China will not engage in "de-coupling".
"Trade has been the engine of growth and prosperity in APEC since it was founded 30 years ago", New Zealand Prime Minister Jacinda Ardern said.
Last year's APEC summit in Chile, where Trump had expected to sign a preliminary trade accord with China, was canceled as host city Santiago struggled with street protests. On that occasion, leaders failed to agree on a joint communique for the first time since 1993, due to trade disputes between the USA and China.
Mr Xi on Thursday said "mounting unilateralism, protectionism and bullying as well as backlash against economic globalisation" had added to risks and uncertainties in the world economy. According to a statement issued by the APEC Secretariat, its nations represent 40 percent of the population, half of global trade, and 60 percent of world GDP.More news: Honda unveils its new Civic on Twitch to attract younger buyers
"I shared Malaysia's challenging journey of being the organiser of Apec 2020 during the Covid-19 pandemic", he said.