A proposal by Seoul to formally declare peace on the Korean Peninsula was "admirable," but first South Korea must abandon its "hostile policies" towards the Pyongyang, Kim Yo-jong, the sister of North Korea's leader, said Friday.

South Korean President Moon Jae-in earlier this week proposed at the United Nations to declare a formal end to the 1950-53 war on the Korean Peninsula, which would also involve the United States and possibly China.

In a statement published Friday by the state Korean Central News Agency, Kim said that "the declaration of the termination of the war is an interesting and an admirable idea," but that "double-dealing standards, prejudice and hostile policies toward the DPRK and speeches and acts antagonizing us persist."