Ulaanbaatar, Sept. 9 -- President of the National Assembly Tran Thanh Man and his spouse Nguyen Thi Thanh Nga, together with a high-ranking delegation of Vietnam, arrived in Ulaanbaatar on September 9 noon (local time), beginning a three-day official visit to Mongolia at the invitation of Chairman of the Mongolian Parliament Sandag Byambatsogt and his spouse. The top Vietnamese legislator and his entourage were welcomed at Chinggis Khan Aiport by Mongolian Ambassador to Vietnam Ganbaatar Hulan, Chairwoman of the Vietnam - Mongolia Friendship Parliamentary Group (VMFPG) Judagiin Bayarmaam and representatives from Mongolia's Parliament Office and Ministry of Foreign Affairs. Vietnamese Ambassador to Mongolia Nguyen Tuan Thanh and staff of t...