Photo taken on Feb. 18, 2013 shows the scenery of cloud-shrouded trees in the Longlin Autonomous County of All Nationalities, southwest China's Guangxi Zhuang Autonomous Region. China's Arbor Day, or Planting Trees Day, which falls on March 12 each year, is an annual compaign to encourage citizens to plant and care for trees. [Xinhua/Wei Wanzhong]