The 2018 Winter Olympics have officially kicked off. The opening ceremony was watched by millions around the world. But many are also keeping their eye on the future of the Korean peninsula crisis. Yang Zhao has the details.

The opening ceremony of the 2018 Winter Olympics in Pyeongchang brought together leaders from around the world. But they were not there just for the game. Take a closer look at the stand and you'll see the key players of the Korean Peninsula crisis.

South Korea's Moon Jae-in was seated in the host position with his wife. And behind them, was Kim Jong Un's sister, Kim Yo Jong, the first member of the North's ruling family to visit the South since 1953. She attended the ceremony with the DPRK's top legislator Kim Yong Nam. The two sides notably shared warm greetings at the ceremony.

The rare and historic meeting continued outside the stadium, taking place in the presidential Blue House today, with two other senior DPRK delegates joining in. They had an informal lunch together, but the meeting was not open to the media. It marked the first time in eight and a half years that a ranking DPRK delegation visited South Korea's presidential complex.

By contrast, there was no sign of the relations warming up between Washington and Pyongyang. They have ruled out direct talks on the sidelines of the Games. Kim Yo Jong and US Vice President Mike Pence who sat less than a meter away last night didn't shake hands or speak.

Seated between President Moon Jae-in and Japanese Prime Minister Shinzo Abe, Pence was trying to show solidarity with both US allies. But perhaps the alliance was not as firm as he hoped. Outside the stadium, Tokyo warned Seoul against falling for what it has called Pyongyang's 'charm offensive', while Moon's administration challenged the comfort women agreement made between Abe and Moon's predecessor Park Geun-hye. YANG ZHAO, CGTN.