SEOUL, Feb. 10 (Xinhua) -- Kim Jong Un, top leader of the Democratic People's Republic of Korea (DPRK), invited South Korean President Moon Jae-in to visit the DPRK at Moon's convenient time, the presidential Blue House said Saturday.

Kim Eui-kyeom, spokesman for President Moon, told a televised press briefing that Kim Yo Jong, the younger sister of the DPRK leader, delivered a letter of Kim Jong Un to Moon showing Kim's willingness to improve inter-Korean relations.

The younger Kim delivered the DPRK leader's message, saying the DPRK leader is willing to meet President Moon at an earliest possible date. The DPRK leader invited Moon to visit the DPRK at Moon's convenient time.

The invitation was made during an informal meeting between Moon and the DPRK's Olympic delegation, including the younger Kim who serves as the first vice director of the Central Committee of the ruling Workers' Party of Korea.