Kim meeting Trump fulfilled an important foreign policy goal for North Korea, and China, its main trading partner, has been observed resuming trade with Pyongyang.
During Pompeo's recent trip, meant to negotiate the details of the nuclear agreement signed during the Trump-Kim summit in Singapore, North Korea called denuclearization demands by the USA "gangster-like".
Pompeo also brought a letter for Kim from the president but didn't get to meet the North Korean dictator.
"I actually do have a little gift for him but you'll find out what that gift is when I give him", Trump said. "We will steadfastly play a positive role and make constructive contributions towards pushing for the denuclearization of the Korean peninsula and peace and stability in the region", Chinese foreign ministry spokeswoman Hua Chunying told press briefings repeatedly.
The professor urged Trump not to offset his diplomatic efforts after the Singapore summit, saying he should next persuade his hawkish aides to come up with a feasible approach on "full denuclearization" - one that differs from the past complete, verifiable and irreversible dismantlement (CVID) of North Korea's nuclear programs.
Secretary of State Mike Pompeo, right, and Kim Yong Chol, a North Korean senior ruling party official and former intelligence chief, arrive for a lunch at the Park Hwa Guest House in Pyongyang, North Korea, July 7, 2018. "But, it seems that the USA misunderstood our goodwill and patience".
Yesterday Trump tweeted about North Korea's apparent refusal to denuclearise.
Instead, North Korea appears as though it's conducting business as usual.
On Monday, the Pentagon put a dollar amount - about US$14 million - on the costs of Freedom Guardian, a large-scale joint drill that was to kick off in August but which was shelved after Trump met with North Korean leader Kim Jong Un in a historic summit Singapore last month.
"If those requests were "gangster-like" then the world is a gangster, because there was a unanimous decision at the U.N. Security Council about what needs to be achieved", Pompeo told reporters in Tokyo, his next stop after Pyongyang.