Hanoi, Sept. 9 -- President of the National Assembly (NA) Tran Thanh Man, his spouse Nguyen Thi Thanh Nga, and a high-ranking Vietnamese delegation, left Seoul on September 9 morning, concluding their official visit to the Republic of Korea (RoK) and departing for an official visit to Mongolia at the invitation of Chairman of the State Great Hural of Mongolia Sandag Byambatsogt and his spouse. Seeing off the delegation at Seongnam Airport in Seoul were Director of the international affairs bureau under the Office of the RoK's National Assembly Na A Jeong, Vietnamese Ambassador Vu Ho, and embassy officials and staff. During his stay, NA President Man held a meeting with Prime Minister Han Seong Sook and talks with NA Speaker Cho Jeong Sik....