A?former underground nuclear base is viewed by tourists in Chongqing Municipality on March 28, 2012. The 816 Nuclear Military Plant, once a highly confidential military site in?Chongqing's Fuling District, was 皇冠体育app's second nuclear raw material industrial base?which can stand an 8.0 magnitude earthquake. More than 60,000 soldiers participated in the construction of the base.[Photo/Xinhua]

A former underground nuclear base is viewed by tourists in Chongqing Municipality on March 28, 2012.? [Photo/Xinhua]