Kim Yo Jong, 30, is 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.
Earlier on Saturday, the Olympic diplomacy seemed to yield an early dividend as Kim Yo-jong, Kim Jong-un's sister and trusted adviser, met with Moon at the presidential Blue House in Seoul in the highest-level contact between the two Koreas in years. She passed on a message from Kim, who invited Moon to visit Pyongyang "at a convenient date".
Stakeholders of the Olympics have been wary of the threat from hacking and some sponsors have taken out insurance to protect themselves from a cyber attack. "It is a historical issue that transcends time".
Last year, North Korea conducted dozens of missile launches and its sixth and largest nuclear test in defiance of U.N. Security Council resolutions as it pursues its goal of developing a nuclear-armed missile capable of reaching the United States.
At the postgame news conference, Jong would not comment on whether the unified team would ultimately contribute to peace.
But it lost 8-0, and the chances of the dazzling but largely symbolic moves leading to a tangible political breakthrough are nearly as remote, analysts say.
Indeed, some spectators at Saturday's game were skeptical that bringing the two countries together on one team would have any lasting effect.
From the South Korean side were Unification Minister Cho Myoung Gyon, Culture, Sports and Tourism Minister Do Jong Hwan, 10 other government and parliamentary officials as well as experts, said Xinhua. "We surely have to win competitions but I mean attending the Olympics has a significant meaning", the North's Alpine coach, Pyon Yong Do, said after a meeting of coaches on Sunday.
There was early criticism in South Korea that the new players would throw off team chemistry and cost South players time on the ice after working together for months to shine on the sport's biggest stage. He is also urging the North Koreans to sit down with the United States at the earliest opportunity.
The merged team had to overcome some language barriers.
The North has sent almost 500 people to the PyeongChang Games.
"There is no daylight between the United States, the Republic of Korea and Japan on the need to continue to isolate North Korea economically and diplomatically until they abandon their nuclear and ballistic missile program", Pence told reporters during a flight to the United States following his visit to South Korea, where the Olympic games are being held.
Mattis also said he doubted that the sporting rapprochement would undermine US-South Korean ties.
"I think we had the great support from the people in the stadium, but then we were not able to live up to their expectations", Jong said.
Still, she said, "as one we are stronger than being divided".
"In order to stop the further outbreak of the virus, we're quarantining patients beginning from the diagnosis to the treatment", stated KCDC Director Kim Hyun-jun, who added that January and February are known to be the "peak season" for the disease. "We just wanted to perform well in front of the crowd". It is Kwangwoon University, not Kwangwon.