LANG SON PROVINCE Square: 8,331.2 km 2 Population : 735,600 people (2010) City: Lang Son City. Districts: Trang Dinh, Van Lang, Van Quan, Binh Gia, Bac Son, Huu Lung, Chi Lang, Cao Loc, Loc Binh, Dinh Lap. OVERVIEW Lang Son is a northeastern province which is located on the Sino-Vietnamese border over a stretch of 253km. The capital of Lang Son, 500m above sea level, is situated on the left bank of Ky Cung River. Opposite the town and on the...