With the spirit “All for the front, all for the nation’s victory”, nun Dam Duyen in Nam Ngan, Thanh Hoa province volunteered to be a courier twice though bonzes did not need to take part in the movement to carry food and weapon and other things to the Dien Bien Phu Campaign. To prepare for her long trips, bonze Dam Duyen made this 0.65 – litter bottle lamp. It was an essential item for a courier, because they had to move at night it did not turn off when it was rainy or windy. She tied it on the shoulder pole to climb over high mountain passes, ford deep rivers and walked thousands of kilometers of forest paths to carry more than 20 kilograms of rice to the frontline..