The despot set up a carefully managed photoshoot with the 140-member group and congratulated them on their success.
He praised their “high artistic ability” according to the Korean Central News Agency (KCNA) in a bid to show who was in control.
And, in a show of solidarity with the neighbour that he has been at war with for decades, Kim said that he was pleased that “the fellow countrymen in the South, including President Moon Jae-in and his wife expressed satisfaction over the performances”.
The two Koreas agreed for the orchestra to play in South Korea when the North agreed to take part in the Olympic games.
A concert was held on February 8 in the South Korean city of Gangneung, at an Olympic venue.
They held another event on Sunday in the National Theatre of South Korea, which Kim Yo-jong – the North Korean leader’s sister – attended.
Kim Yo Jong and other senior North Korean officials departed for Pyongyang on Sunday night on Kim’s private jet.
But the gentle-looking sibling of the dictator stole the show after she attended the opening ceremony at the Winter Olympics in Pyeongchang.
The North Korean leader scored some badly needed publicity points by sending his little sister to the games and extending an invitation to South Korean President Moon Jae-in to come to Pyongyang in the near future.
Kim Yo Jong has become an increasingly prominent figure in her brother’s government and the first member of the North’s ruling family to visit the South since the end of the 1950-53 Korean War.
Before flying south, she said, she had expected “things would be very different and unfamiliar”, according to a statement from President Moon’s office.
A spokesman added: ”But it turned out that there were many things similar and in common. I hope that the day we become one will be brought forward.”
But President Moon’s growing ties to the North has angered conservatives, who accuse him of being a North Korea sympathiser and undermining the security alliance with the US.
The issues that divide the Koreas are all too real.
Kim, for all of his newfound interest in cozying up with Seoul, is clinging to his totalitarian leadership style, nuclear weapons and long-range missiles as tightly as ever.
Civilian contact is strictly banned between the two Koreas, which have been divided by the heavily fortified Demilitarised Zone since the 1950-53 Korean War ended with an armistice instead of a peace treaty.
Tensions soared last year as the North staged a series of nuclear and missile tests in violation of UN resolutions, while leader Kim and US President Donald Trump traded colourful insults and threats of war.
President Moon has long sought engagement with the North to bring it to the negotiating table, and for months has promoted Pyeongchang as a “peace Olympics”.
But controversy over the North’s participation — particularly the formation of a unified women’s ice hockey team, seen as unfairly denying Seoul’s own citizens a chance to compete on the Olympic stage — has hit his approval ratings.
Many older South Koreans on both sides of the political divide harbour a nostalgic longing for some form of reunification — conservatives through the North’s collapse, liberals through a more amicable arrangement.
But younger South Koreans — many of whom voted for Moon in May — have spent their adult lives in a culturally vibrant democracy regularly menaced and occasionally attacked by Pyongyang.