SEOUL—North Korean leader Kim Jong Un expressed hope for a peaceful 2019 in a personal letter sent to South Korean President Moon Jae-in, a Seoul government spokesman said, in a goodwill gesture that appears aimed at reviving stalled inter-Korean economic projects.

In the two-page letter, received Sunday, the North Korean leader emphasized that the two Koreas had significantly reduced the chances for armed conflict this year through three inter-Korean summits and continued bilateral talks, the spokesman, Kim Eui-kyeom, said.

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