A model of F-16 performs during the 2015 China Aeromodelling Design Championships in Yantai, east China's Shandong Province, May 30, 2015. Over 300 competitors from more than 20 teams took part in the five-day competition which kicked off on Saturday. (Xinhua/Tang Ke)

Competitors carry a model of F-16 during the 2015 China Aeromodelling Design Championships in Yantai, east China's Shandong Province, May 30, 2015. Over 300 competitors from more than 20 teams took part in the five-day competition which kicked off on Saturday. (Xinhua/Tang Ke)

A model of fixed wing aircraft performs during the 2015 China Aeromodelling Design Championships in Yantai, east China's Shandong Province, May 30, 2015. Over 300 competitors from more than 20 teams took part in the five-day competition which kicked off on Saturday. (Xinhua/Shen Jizhong)

Combined photo taken on May 30, 2015 shows aircraft models performing during the 2015 China Aeromodelling Design Championships in Yantai, east China's Shandong Province, May 30, 2015. Over 300 competitors from more than 20 teams took part in the five-day competition which kicked off on Saturday. (Xinhua/Shen Jizhong)