People watch as Zeng Xianglu draws the Mona Lisa with chalk at a square in Nanjing, Jiangsu province on December 20. According to local media, Zeng, 50, a self-taught artist, started travelling around the country six years ago and has drawn Mona Lisa with chalk in almost every city he visited. It takes Zeng around nine hours to complete one copy of the Mona Lisa painting. Reuters/Stringer