![#CHINA-BEIJING-NUCLEAR INDUSTRY-EXHIBITION (CN)](133266371_11n.jpg)
Visitors view an unmanned nuclear emergency helicopter at the exhibition "Nuclear Industry China 2014" in Beijing, China, April 15, 2014. The four-day exhibition kicked off here Tuesday. Nearly 200 companies from 40 countries displayed their products developed in recent years. (Xinhua/Wang Jingsheng)