A representative presents a light weight biomimetic mechanical arm at the 4th International Conference of Bionic Engineering (ICBE 2013) in Nanjing, capital of east China's Jiangsu Province, Aug. 14, 2013. The ICBE 2013, which kicked off Wednesday at Nanjing University of Aeronautics and Astronautics, attracted about 300 representatives from both China and abroad. (Xinhua/Sun Can)

A representative presents an image displaying the details of a bee's movement at the 4th International Conference of Bionic Engineering (ICBE 2013) in Nanjing, capital of east China's Jiangsu Province, Aug. 14, 2013. The ICBE 2013, which kicked off Wednesday at Nanjing University of Aeronautics and Astronautics, attracted about 300 representatives from both China and abroad. (Xinhua/Sun Can)

A representative use a lizard to test an apparatus at the 4th International Conference of Bionic Engineering (ICBE 2013) in Nanjing, capital of east China's Jiangsu Province, Aug. 14, 2013. The ICBE 2013, which kicked off Wednesday at Nanjing University of Aeronautics and Astronautics, attracted about 300 representatives from both China and abroad. (Xinhua/Sun Can)

A representative from Nanjing University of Aeronautics and Astronautics presents a wall gecko-shaped robot at the 4th International Conference of Bionic Engineering (ICBE 2013) in Nanjing, capital of east China's Jiangsu Province, Aug. 14, 2013. The ICBE 2013, which kicked off Wednesday at Nanjing University of Aeronautics and Astronautics, attracted about 300 representatives from both China and abroad. (Xinhua/Sun Can)

A student from Nanjing University of Aeronautics and Astronautics presents a bird-shaped aircraft at the 4th International Conference of Bionic Engineering (ICBE 2013) in Nanjing, capital of east China's Jiangsu Province, Aug. 14, 2013. The ICBE 2013, which kicked off Wednesday at Nanjing University of Aeronautics and Astronautics, attracted about 300 representatives from both China and abroad. (Xinhua/Sun Can)