Cai Guo-Qiang during the installation of Cai Guo-Qiang: Peasant da Vincis at the Museum of Science and Technology Leonardo da Vinci. An interpretation of Leonardo's machines by the Chinese artist Cai Guo Qiang. On display in 2015 were flying machines, submarines and other symbols of modernity, hand-built by peasants-inventors from different rural areas of China.