Mongolia has invited Kim Jong Un to visit “at a comfortable time,” state-run media reported Sunday, less than two weeks after South Korean foreign minister Park Jin visited the country and called for more robust ties between Seoul and Ulaanbaatar.

The Korean Central News Agency (KCNA) said Sunday that President Ukhnaagiin Khurelsukh extended the request in a letter to the North Korean leader marking DPRK’s founding anniversary last week.

“Mutual top-level and high-level visits are of important significance in improving bilateral relations and strengthening political trust,” Khurelsukh reportedly wrote, inviting Kim Jong Un to the Central Asian country for