The North and South Korean teams marched side-by-side under a unified flag during the athletes' parade section of the ceremony which ended with Korean skating superstar Kim Yu-Na, Olympic champion in Vancouver in 2010, lighting the Olympic flame to get the Games underway after being handed the torch at the top of an ice chute.

However, Chang continued to feel anxious over the ongoing tension with North Korea.

Kim Yo-jong invited Moon to visit "at the early date possible", a spokesman for South Korea's Presidential Palace said.

Kim Jo Jong carried a blue folder adorned with a seal, which was later confirmed to have contained a private message from Kim Jong Un himself.

The game was a mismatch pretty much from the opening faceoff, though you would have never known it by the constant noise made by tightly choreographed North Korean cheerleaders and the much looser fans from the South. The unified Korean team also marched together in a attractive display under a unification flag but the show stealer was Pita Taufatofua-who competed in taekwondo in Rio's Summer Games and is in Pyeongchang to compete in cross-country skiing-for reprising his bare-chested appearance as flag bearer for Tonga. UN Secretary General Antonio Guterres called for denuclearization talks during a brief conversation with North Korea's nominal head of state Kim Yong Nam, UN Secretary General's Deputy Spokesperson Farhan Haq told reporters on Friday.

The powerful sister of North Korean leader Kim Jong Un is watching a joint Korean hockey team's historic first match against Switzerland at the Olympics with South Korean President Moon Jae-in.

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He added that USA and allied military exercises will be delayed until after the end of the Winter Olympics on February 25.

Moon's desire to engage North Korea was in contrast to his USA ally. North Korea's treatment of his son, he said, "is their standard ― that's the way they do business".

Mr Kim Yong Nam also wrote in his own handwriting that it is the Korean people's wish to be united and make concerted effort for unification, Yonhap reported.

Pence and Japanese Prime Minister Shinzo Abe sat nearby, looking expressionless.

Her exact role in the regime is unclear, but her job is similar to a chief of staff and she regularly reviews the statements and speeches issued by her brother. But the prospect could sow division between the dovish leader, who has long argued for engagement with the nuclear-armed North to bring it to the negotiating table, and US President Donald Trump, who a year ago traded personal insults and threats of war with Kim.

The meeting followed a brief encounter between the two parties at the Olympic Opening Ceremony on Friday, in which Moon twice shook hands with Yo-jong.