Tourists visit Dr. Sun Yat-sen's Mausoleum in Nanjing, capital of east China's Jiangsu Province, Nov. 12, 2013. According to statistics released by Zhongshan Mountain National Park, 25 million tourists have visited Dr. Sun Yat-sen's Mausoleum since its free-opening to the public on Nov. 12, 2010. (Xinhua/Han Yuqing)