Undated photo shows a part of a newly-discovered group of tombs, which are believed to date back to the Han Dynasty (206 B.C.-220 A.D.), on the south bank of a section of the Yellow River in Luoyang, central China's Henan Province. A group of more than 100 tombs dating back up to 2,200 years ago have been discovered near a section of the Yellow River in the city of Luoyang, archaeologists said. (Luoyang City Cultural Relics and Archaeology Research Institute/Handout via Xinhua)