The Peace House at the DMZ was the venue for a meeting last month between Mr Kim and South Korean President Moon Jae-in.
The success of the summit held between South Korean President Moon Jae-in and his North Korean counterpart President Kim Jong-un exceeded all optimistic expectations as the two leaders seemed to forge not only a warm personal rapport, but also struck broad agreements on most if not all the issues dividing the two countries.
But the warm welcome was not Mr Kim's only gift from the South's leader; he also received a USB drive from Mr Moon.
He slammed the United States for saying that it would not ease the sanctions and pressure until North Korea gives up its nuclear weapons completely.
Trump's "leadership and his maximum pressure policy together with global solidarity brought us to this juncture", Moon's National Security Adviser Chung Eui-Yong told reporters in March.
The South's Yonhap news agency carried a similar report.
Dr Lim Tai Wei, adjunct research fellow at East Asian Institute, National University of Singapore, told The Straits Times: "Singapore's neutrality is a draw for both (US and North Korea)". On Friday, President Trump announced that he had set both a location and a date for his meeting with the North Korean dictator.
The North's leader Kim Jong-un, in his turn, during the inter-Korean summit expressed his willingness also to hold talks with Japanese Prime Minister Shinzo Abe.
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The U.S. and China would also oversee the complex and years-long peace process that could end with a U.S. withdrawal from the Korean Peninsula, said Korea analyst Barry Blechman of the Stimson Center in Washington.
There has been much speculation over the location of historic summit.
"The USB makes the case to Kim - there really is another path for you", John Delury, an expert in North Korean affairs at Seoul's Yonsei University, told Axios.
But Trump isn't the only one praising the U.S.'s involvement in North Korea relations.
"This act can not be construed otherwise than a risky attempt to ruin the hardly-won atmosphere of dialogue and bring the situation back to square one", a foreign ministry spokesman was quoted as saying. Asked if they would be released, Trump said: "We're having very substantive talks with North Korea".
He added: "Stayed tuned".
On the possible release of three American detainees in the North, the White House official said he has "nothing to announce".
Secretary of State Mike Pompeo, at his swearing-in ceremony last week, said the USA will not repeat the mistakes of past administrations when it comes to limiting the nuclear programs of rogue nations. -North Korea summit, according to the Blue House.