Noting that the two leaders had positive and productive meetings, Spicer said Trump and Xi agreed to work in concert to expand areas of cooperation while managing differences based on mutual respect.
On Friday, Mr. Xi returned to the resort in the late morning to meet with Mr. Trump and stroll around the grounds of Mar-a-Lago.
The two leaders were joined Thursday evening by United States first lady and former model Melania Trump and Peng Liyuan - a celebrated folk singer whom Trump hailed as a "great, great celebrity".
Commerce secretary Wilbur Ross said that "the most interesting thing to me was they expressed an interest in reducing their net trade balance because of the impact it's having on money supply and inflation". On Friday, the unpredictable Trump not only set a different tone but also avoided any public lapses in protocol that Chinese officials had feared could embarrass their leader.
The mood at the summit was upbeat. Trump could be seen chatting and gesturing to Xi, who did the same.
Mr. Trump said he believes he made "tremendous progress" in the US-China relationship during talks with Mr Xi.
The exchange of messages came before the U.S. airstrikes, which were U.S. President Donald Trump's biggest foreign policy move since taking office in January in reaction to what Washington says was a gas attack by al-Assad's government that killed at least 70 people in a rebel-held territory.
In a tweet on Saturday, Trump wrote of the meeting: "goodwill and friendship was formed, but only time will tell on trade".
The Secretary of State, the former CEO of Exxon Mobil, an energy firm, also signalled impatience with those calling for America to maintain a separate, specific high-level dialogue around human rights.
Airstrike on Syrian town hit by chemical weapons kills 1
A Saturday airstrike by the USA -led coalition killed at least 21 people, including a woman and her six kids on a boat in the Euphrates River, according to activists.
Alas for President Trump, he is now discovering that he cannot walk away from China any more than China can abandon him.
Ahead of the two presidents' second round of talks, senior Chinese and U.S. officials initiated two newly-installed dialogue mechanisms in economy, as well as diplomacy and security.
Tillerson said Trump had accepted Xi's invitation to visit China and that they also agreed to upgrade a U.S.
Xi and Peng arrived in Mar-a-Lago on Thursday and spent some social time with the Trumps before policy meetings were scheduled Friday. No new deals or concrete proposals were unveiled at the meeting, however.
Trump informed the Chinese leader personally of the strike as the 59 Tomahawk missiles were winding their way to the Shayrat airbase.
In the lead-up to the much anticipated summit, the Trump administration repeatedly warned that it would use "all options", including military strikes, to ensure that North Korea halted its nuclear and missile programs. -China cooperation on non-proliferation.
China-which supplies 90 percent of North Korea's food and energy-could force Kim Jong-un to the negotiating table.
The war has also entangled Russian Federation and the United States, and sent shock waves through Europe, which streams of Syrian refugees have fled to. Foreign relations committee member senator Ed Markey (D-MA) expressed the feeling of many, suggesting that an increased U.S. military presence in the region will result in "an escalation of tension that could lead to nuclear war".
"The attack on Syria demonstrates that the Trump administration won't deviate from the traditional US foreign strategy and that it intends to use the Syrian issue to consolidate its ruling position", Li Yonghui, a research fellow at the Chinese Academy of Social Sciences, said in an opinion piece published Monday by the daily, noting how the missile strikes are "an embodiment of the USA supremacy".
One other phrase was notable for its absence. "We did begin those discussions today, but I would just emphasize there was a lot going on in two days". The Obama administration had pointedly refused to embrace that formula, but Tillerson caused a stir when he quoted Chinese rhetoric echoing the framework during his visit to Beijing.