Oleg Kozhemyako were present at the ceremony, which featured a Russian military band playing both North Korean and Russian national anthems. Observers said Kim was expected to return to Pyongyang, the North Korean capital, around Monday afternoon. North Korea has publicly sought to introduce such high-tech weapons systems citing what it called intensifying U.S.-led hostilities. Kozhemyako, the Primorye governor, said a delegation from Russia’s Far East would visit North Korea. Kim invited Putin to visit North Korea at “a convenient time,” and Putin accepted.