Citizens offer silk flowers as sacrifice to the deceased in a cemetery in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, March 29, 2011. As the Tomb Sweeping Day approaches, which falls on April 5 this year, many people in Yinchuan chose to pay respect to the tombs of their deceased beloved ones with flowers instead of burning joss paper and setting off firecrackers which are harmful to environment. [Xinhua/Peng Zhaozhi]