South Korean President Moon Jae In arrives in Pyongyang for the 3rd Inter-Korean summit on September 18, 2018 (Photo: Pyeongyang Press Corps)

High on the agenda of the talks are ways to improve and develop inter-Korean relations, promote the US-North Korea Dialogue to denuclearize the Korean peninsula, and reduce tension between the two countries. The two leaders are scheduled to continue their talks on Wednesday and hold a joint press conference.

North Korea has embarked on an unprecedented series of meetings this year with both the South and the US. But talks with Washington have reached a deadlock, with both sides so far agreeing only to very general goals. South Korea's president hopes to be a mediator between the two, while working to boost the inter-Korean relationship.