Only about 57,000 people registered with the South Korean Red Cross to meet their separated relatives remain alive, majority aged over 70.
Trump told reporters after their June 12 summit that Kim had pledged to dismantle one of his missile installations, which would be North Korea's most concrete concession at the landmark meeting in Singapore. The US says China is in agreement on that point, although Chinese officials have repeatedly stated that sanctions should not be considered an end to their own.
However, the president at the time did not name the site.
In April, North Korea and South Korea agreed to talks to end the ongoing 65 year conflict.
Souvenir shops that once stocked items criticising the United States aimed at North Korea tourists near the demilitarised zone (DMZ) on the Korean border, as well as in the capital Pyongyang, have removed the often violent and negative stock.
CBS News was the first to identify the exact site.
North Korea announced before the Singapore summit the suspension of its ICBM testing and also closed its nuclear bomb test site, where it conducted several explosions in front of visiting media that it said were to destroy testing tunnels.
Trump has praised the Singapore meeting as a success.
Kim is expected to return to Pyongyang on Wednesday.
Senegal and Japan fans help clean up stadiums following World Cup games
As seen in videos, supporters of the "Samurai Blue" carried waste bags and roamed around the stadium to pick up all sorts of the litter left by spectators.
And as far as the South Koreans are concerned, the last thing they want is probably a North Korea that is secretly retaining its nuclear capabilities and undergoing rapid economic growth at the same time.
When the United States recovered 208 cases of remains from the North Koreans in the 1990s in what became known as the "K208 cases", scientists found that they were extensively commingled, with the remains of at least 400 service members inside.
Yet even people unhappy with Trump overall are willing to admire his efforts at detente with North Korea. It also reportedly has a structure that can support ballistic missiles. They're destroying their engine site.
Any joint statement is unlikely to include economic cooperation with the North, Im said.
"The summit was heavy on pomp and circumstance, but light on substance", said Bruce Klingner, senior research fellow at the Asian Studies Center for The Heritage Foundation, a conservative think tank.
Kim and Xi discussed measures to bolster "strategic and tactical co-operation between their nations during talks in the Chinese capital".
He stressed the necessity of "focusing on the development of cooperation" with Russian Federation in these very areas, adding that a committee on northern economic cooperation had been established under the presidential administration a year ago to address issues of economic cooperation with Russian Federation.
"If they were dismantling more facilities at Sohae, such as the launch pad itself, that would be a very big development, as Sohae is their main satellite launch facility. In fact, it was actually four of their big test sites", he said. After departing that gathering in Quebec, Trump attacked Justin Trudeau as "dishonest" and "weak" after the Canadian prime minister told reporters his government would retaliate against new USA tariffs it viewed as unfair.
News of the expected transfer comes as US officials look for signs that North Korea intends to follow through with its stated desire to denuclearize.