A man climbs on a ladder of knives during an activity held to mark the Double Third Day, a traditional festival of Chinese ethnic groups in Ningde of Fujian province on April 21, 2015. The festival falls on the third day of the third month of the Chinese lunar calendar. Climbing the knife ladder is performed by brave and fearless men. It is a thrilling show displaying people's courage and self-sacrifice in their past lives. [Photo/China News Service]