(VOVworld) – President Truong Tan Sang worked with Son La province on Saturday on its implementation of the resolution of the 11^th National Party Congress on socio-economic development and national defense. He said the province should continue to tap its potential in agriculture and forestry and invest more in infrastructure building in disadvantaged areas. He noted that the province should improve management to prevent ineffective investment. On Friday President Sang visited and presented gifts to people in Song Ma and Sop Cop border districts.