Seoul urged that reunions of families divided by the 1950-53 Korean War -- one of the most emotive legacies of the conflict -- be held at the same time as the Games.
The talks were held in Panmunjom, the truce village in the Demilitarized Zone that splits the peninsula, with the North's group walking over the Military Demarcation Line to the Peace House venue on the southern side -- just yards from where a defector ran across in a hail of bullets two months ago.
In accordance with standard practice in the North, Ri wore a badge on his left lapel bearing an image of the country's founding father Kim Il-Sung and his son and successor Kim Jong-Il. Cho also wore a lapel badge, depicting the South Korean flag.
As well as its athletes, the North proposed sending a high-level delegation, supporters, art performers and a taekwondo demonstration team to the Games, the South's vice unification minster Chun Hae-Sung told journalists.
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"Let's present the people with a precious new year's gift," said the North's Ri. "There is a saying that a journey taken by two lasts longer than the one travelled alone."
The atmosphere was friendlier than at past meetings, and Cho told him that Seoul believed "guests from the North are going to join many others from all around the world" at the Olympics.
"The people have a strong desire to see the North and South move toward peace and reconciliation," he added.
Seoul has been keen to proclaim the Games in Pyeongchang, just 80 kilometres (50 miles) south of the DMZ, a "peace Olympics" but it needs Pyongyang to attend to make the description meaningful.
Kim indicated in his New Year's speech that the North could take part in the Games and Seoul responded with an offer of high-level dialogue. Last week the hotline between the neighbours was restored after being suspended for almost two years.
The North so far has only two winter sports athletes qualified for the Games, but hundreds of young, female North Korean cheerleaders have created a buzz at three previous international sporting events in the South.
The group may stay on a cruise ship in Sokcho, about an hour's drive from the Olympic venue, which would enable their movements to be closely monitored and controlled.
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