"We have great concerns over the actions that China has taken and I look forward to having the opportunity to discuss each of those today because this is an incredibly important relationship". Reporters were then ushered from the room.
Wang said the United States has been escalating trade tensions between the two sides and dealt with Taiwan in a way China finds objectionable. Trump also approved a weapons sale to Taiwan, the self-ruled island the Communist mainland claims as its own territory, and sanctioned a Chinese company and its leader over an arms purchase from Russian Federation.
The Trump administration last month hit China with tariffs on $200 billion worth of Chinese products, and Beijing retaliated by imposing tariffs on $60 billion worth of U.S. goods.
China's foreign minister has told visiting U.S. Secretary of State Mike Pompeo that the United States should stop what he called groundless attacks on his country's policies.
They met for about two hours, including lunch at a prestigious state guesthouse.
Pompeo said he was also hopeful that Kim would allow inspectors to visit a "missile engine test site", believed to be a facility in the town of Tongchang-ri that North Korea says it has begun dismantling.
The U.S. and Japan have pushed for the North to compile and turn over a detailed list of its nuclear sites to be dismantled as a next step in the process.
He called on the US side to stop "groundless accusations against China and wrong actions undermining China's core interests".
In their later meeting, Yang expressed Chinese frustration with Washington while avoiding specifics, telling Pompeo relations are "facing challenges".
"The trade war's impact on the economy is showing", Xu Hongcai, the deputy chief economist at the China Center for International Economic Exchanges, a Beijing think tank, said.
Pompeo was greeted on the airport tarmac by senior official Kim Yong Chol, who told him that only three people could join him in the meeting that he'd come for with North Korean leader Kim Jong Un.
But unlike his last visit to Beijing in June, Pompeo did not have a meeting with Chinese President Xi Jinping.
But since the Singapore summit, the road towards warmer ties has been bumpy. "And this letter was further evidence of progress in that relationship".
May warned of Tory revolt unless she drops Chequers plan for Brexit
Forty-eight legislators would need to write such letters to trigger a vote of confidence in the leader. Another Brexiteer who enjoyed a successful week from the fringe of the party conference.
President Trump and Chairman Kim held an historic summit on June 12.
The announcement Sunday came shortly after Pompeo arrived in Seoul, following his fourth visit to North Korea, where he met with Kim.
After Seoul, Pompeo ends his trip Monday in China, North Korea's political and economic lifeline.
The two sides agreed to set up "working-level" negotiating teams to finalize the date and time for a summit, as well as set the stage for a successful summit meeting, he said. "But we do think right that this is a place where ultimately some of these big hard issues have to be resolved by the nation's most senior leaders and hope to have those presented in a way that the two leaders can resolve them when they get together".
"The United States is continuing to act against Chinese interests, including the U.S".
Given the delicate nature of talks with North Korea, it's possible that Pompeo and his hosts reached agreements not yet made public. He pledged the Trump administration would coordinate and unify its strategy for denuclearisation with its allies. North Korea has shut it down in past negotiations - and then reopened it. US officials also made no reference to past statements about wrapping up denuclearization by 2021, a deadline that Trump and Pompeo have since backed away from.
Interested in North Korea?
"I've never been involved in an worldwide discussion where there weren't differences of view, not only between governments but inside of governments", he said.
High-level exchanges between the two countries have been frozen, including a planned diplomatic and security meeting between US Secretary of Defence James Mattis and Chinese defence minister Wei Fenghe originally scheduled for mid-October in Beijing. "That is a necessary component of getting to the best deliverable".
Speaking to the press, Pompeo said that inspectors would be allowed at the site "as soon as we get it logistically worked out". It has not taken any steps to halt nuclear weapons or missile development.
"We can't rule out the possibility that Washington. may move in the direction of partial easing of sanctions based on progress in denuclearisation", he said. US officials have thus far said the penalties will remain in place until the North's denuclearization is fully verified.
It's the first time U.S. Secretary of State Mike Pompeo has briefed China following right after denuclearization talks with North Korea.