"We are discussing Chairman Kim Jong-un's reciprocal visit before the year's end with all possibilities on the table", he said.
The project has faced delays over concerns it could violate United Nations sanctions imposed on the North over its nuclear and missile programmes. Kim, who doubles as director of the North's United Front Department, which is responsible for inter-Korean relations, is a former spy chief who headed North Korea's Reconnaissance General Bureau.
He continued: "I hope inter-Korean ties will also be like this".
The group visited children's food plants and discussed cooperation with their North Korean counterparts, according to reports.
Chung revealed plans to invite North Korean wrestlers to Seoul next month. "These acts by the U.S. apparently came from a medieval-era way of thinking that only threatening, coercive and barbarian tactics could enhance its negotiating leverage", it stated, adding that such tactics would not work.
"It is created to incentivize North Korea to take concrete steps on denuclearization", said Robert Manning, a senior fellow at the Atlantic Council.
At a summit in April, Moon and North Korean leader Kim agreed to take practical steps towards reconnecting the rail and road systems of the two countries.
The joint survey would last for 18 days from Friday on railways across the heavily-armed inter-Korean border.
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When he was elected in 2015, Mr Macri promised market-friendly reforms to get Argentina's isolated economy back on track. This year, the G20 summit will for the first time ever be hosted by a South American nation.
But for traditional Korean wrestling, ssireum, the South applied in 2016, a year after the North - which uses a different system to render Korean into English and transliterates it as ssirum.
The two Koreas plan to conduct a survey of a 400 kilometer section of rail between Kaesong and Sinuiju between November 30 and December 5, as part of plans to connect and modernize the Gyeongui railway line.
The team from the North is expected to be similar in size, and represent similar government bodies and institutions. North Korea ignored the invitation.
Despite apparent flexibility on sanctions, the USA remains guarded.
It doesn't seem like there's a "ruff" relationship between the two Koreas at the moment.
US Defence Secretary James Mattis last week said the US and South Korea are reducing the scope of "Foal Eagle", a joint drill scheduled for spring 2019. "We are glad that President Moon Jae-in and President Putin meet every year".
The Trump administration, however, shows no sign of making any concessions to North Korea. South Korea had about 60 posts inside the DMZ guarded by layers of barbed wire and manned by troops with machine guns.
"As we're going through the diplomatic aspect, we don't want to actually do something that's going to derail the diplomatic negotiations", Gen Brown said.