Sunshine Policy
In May 2017 Moon Jae-in was elected President of South Korea with a promise to return to the Sunshine Policy. In his New Year address for 2018, North Korean leader Kim Jong-un proposed sending a delegation to the upcoming Winter Olympics in South Korea. The Seoul–Pyongyang hotline was reopened after almost two years. At the Winter Olympics, North and South Korea marched together in the opening ceremony and fielded a united women's ice hockey team. As well as the athletes, North Korea sent an unprecedented high-level delegation, headed by Kim Yo-jong, sister of Kim Jong-un, and President Kim Yong-nam, and including performers like the Samjiyon Orchestra. The delegation passed on an invitation to President Moon to visit North Korea. On 1 April, South Korean K-pop stars performed a concert in Pyongyang entitled "Spring is Coming", which was attended by Kim Jong-un and his wife. 
On 27 April, a summit took place between Moon and Kim in the South Korean side of the Joint Security Area. The summit ended with both countries pledging to work towards complete denuclearization of the Korean Peninsula. They also vowed to declare an official end to the Korean War within a year. As part of the Panmunjom Declaration which was signed by leaders of both countries, both sides also called for the end of longstanding military activities in the region of the Korean border and a reunification of Korea. Also, the leaders agreed to work together to connect and modernise their railways.
Park Geun-hye
Park became the 18th president of South Korea on 25 February 2013. At midnight, she took over all presidential authorities including the prerogative of supreme command of South Korea's armed forces from her predecessor Lee Myung-bak. In her inauguration speech at the National Assembly building, Park spoke of her plan to open a new era of hope through "economic prosperity, people's happiness, and cultural enrichment". She particularly expressed her hope that North Korea would give up its nuclear arms and walk on the path of peace and mutual development, and declared that the foundation for a happy era of unification in which all Korean people will be able to enjoy prosperity and freedom and realize their dreams would be built through the Korean Peninsula Trust-building Process. In her inauguration speech, Park presented four guiding principles to realize her administrative vision: economic prosperity, people's happiness, cultural enrichment, and establishment of foundation for peaceful unification. Park's inauguration ceremony was the largest one in South Korean history with 70,000 participants. Diplomatic representatives in Korea as well as high-level delegates specially sent from 24 countries around the world including Thai Prime Minister Yingluck Shinawatra, U.S. National Security Advisor Thomas Donilon, Taiwanese Legislative Speaker Wang Jin-pyng and former Japanese Prime Minister Yasuo Fukuda also participated in the event to congratulate Park.