Wu's trip comes after Trump and Xi met in Florida, where Trump pressed his counterpart to do more to curb North Korea's nuclear programme.
In speeches, Trump had labeled Beijing a "tremendous problem", accusing it of unfairly manipulating its currency and trying to "rape our country" with unfair trade policies. A Beijing trip by Trump before the once-in-five-year Communist Party congress later this year would "send a signal of Xi's strength and confidence", said Taylor Fravel, an associate professor at the Massachusetts Institute of Technology who specializes in China's worldwide relations.
During the two-day summit, which focused on bilateral trade issues and military cooperation, Trump commented on the " tremendous progress " the USA had made with China.
The North Korean missile crisis was the other issue that drew the attention of the two leaders at the summit meeting.
Trump's upbeat assessment of the relations with China contrasted with blunt talk about ties with Russian Federation, a country with which he had repeatedly vowed to start a new partnership. While disputes over China's expansive territorial claims in the South China Sea continue to simmer, the first two months of Mr Trump's tenure have been preoccupied with North Korea.
Mark Feierstein, who served in the National Security Council under President Barack Obama, said it's hard to glean a direction for US policy from Trump's actions in Syria because Trump "is not moored to any coherent ideology or set of ideas". Still, Haley said the USA didn't see a peaceful future Syria with Assad in power.
"Before I send my child to the U.S.to study, I probably need to ask again: 'Is the USA still a safe place?' As minority groups become less accepted in American society, the U.S.is no longer an ideal destination for Chinese students to study".
China, the US, South Korea and Japan all have dedicated envoys who meet regularly to discuss the North Korean issue: a legacy of the long-stalled six-party process that also involved Pyongyang and Moscow.
The top American diplomat also said that the U.S.is prepared to chart "our own course if this is something China is just unable to coordinate with us", echoing Trump's repeated warning that the USA will take on the North on its own unless China helps rein in the North.
Businessman Dennis Shia, 50, thinks that Trump's trade policies could be ultimately self-defeating.
China is ready to enhance law-enforcement cooperation with the USA side, said Xi, calling on the two sides to jointly combat transnational crimes such as drug trafficking, child trafficking, money laundering, cyber crime and organized crime. "This will only increase the price paid by their consumers". Some $347 billion of the $502 billion trade deficit recorded by the US past year was with China.
To Trump's credit, he appears to have come to grips with the reality that the US-China relationship is the most important bilateral relationship in the world, bar none.
Many speculated that China would offer concessions up front. But Trump's decision to launch the airstrikes changed that dynamic quite abruptly and for Pyongyang, more than talk of sanctions or deeper isolation, the missiles may well have been the message. In this way, America has more bargaining power than us.
The two leaders also called for an objective investigation into an incident involving chemical weapons in Syria's Idlib and said they were ready to deepen cooperation to fight terrorism, the Kremlin said in a statement on its website.
However, one missile attack does not mean that Trump has developed a coherent policy on Syria let alone the future shape of the Middle East, something without which the region will not emerge from its current turmoil. None of this is planned, in my view. "The president underscored the need for China to take concrete steps to level the playing field for American workers, stressing repeatedly the need for reciprocal market access".