Technicians maintain a Robinson RAVEN helicopter at the Yida Center of Shanghai General Dynamic Aero Tech. Company (GDAT), a general aircraft 5S store, at the Meishan Bonded Port Area in Ningbo, east China's Zhejiang Province, March 23, 2016. The general aircraft 5S store, which was opened on April 8, 2015, has sold 88 helicopters by far. The store provides more than 20 types of helicopters with selling price at between three to 100 million yuan (461,400-15.38 million US dollars). (Xinhua/Huang Zongzhi)