The winning photos are “Salt Harvest” by Tran Minh Ngoc from the central province of Khanh Hoa, “Accompany” by Tran Thi Minh Hoa from HCM City and “Dawn at sea” taken by Do Huu Tuan from the southern province of Binh Thuan.

The contest was established in 1969 and is held twice a year. This year’s contest has attracted 51,000 entries from professional and amateur photographers from 153 nations around the world.