Photo taken on May 9, 2013 shows the crack-shaped Wenchuan Earthquake Memorial Museum in the town of Qushan, Beichuan Qiang Autonomous County, southwest China's Sichuan Province, May 9, 2013. The museum was officially opened to the public for free on Thursday to commemorate the fifth anniversary of the Wenchuan earthquake, which hit Sichuan on May 12, 2008 and left more than 87,000 people dead or missing. (Xinhua/Xue Yubin)

People visit the Wenchuan Earthquake Memorial Museum in the town of Qushan, Beichuan Qiang Autonomous County, southwest China's Sichuan Province, May 9, 2013. The museum was officially opened to the public for free on Thursday to commemorate the fifth anniversary of the Wenchuan earthquake, which hit Sichuan on May 12, 2008 and left more than 87,000 people dead or missing. (Xinhua/Xue Yubin)

People visit the Wenchuan Earthquake Memorial Museum in the town of Qushan, Beichuan Qiang Autonomous County, southwest China's Sichuan Province, May 9, 2013. The museum was officially opened to the public for free on Thursday to commemorate the fifth anniversary of the Wenchuan earthquake, which hit Sichuan on May 12, 2008 and left more than 87,000 people dead or missing. (Xinhua/Xue Yubin)

People visit the Wenchuan Earthquake Memorial Museum in the town of Qushan, Beichuan Qiang Autonomous County, southwest China's Sichuan Province, May 9, 2013. The museum was officially opened to the public for free on Thursday to commemorate the fifth anniversary of the Wenchuan earthquake, which hit Sichuan on May 12, 2008 and left more than 87,000 people dead or missing. (Xinhua/Xue Yubin)

People visit the Wenchuan Earthquake Memorial Museum in the town of Qushan, Beichuan Qiang Autonomous County, southwest China's Sichuan Province, May 9, 2013. The museum was officially opened to the public for free on Thursday to commemorate the fifth anniversary of the Wenchuan earthquake, which hit Sichuan on May 12, 2008 and left more than 87,000 people dead or missing. (Xinhua/Xue Yubin)