North Korean Premier Pak Thae-song arrived in Beijing on Friday to attend an event marking the 65th anniversary of the signing of a friendship treaty between the two nations, China's Xinhua News Agency reported. A North Korean party and government delegation, led by Pak, was set to visit China until Sunday to attend the event commemorating the treaty anniversary at the invitation of China's Communist Party, according to the report. The Treaty of Friendship, Cooperation and Mutual Assistance was signed July 11, 1961, by late North Korea founder and former leader Kim Il-sung and then Chinese Premier Zhou Enlai.