Amphibious aircraft AG600 rolls off a production line in Zhuhai, south China's Guangdong Province, July 23, 2016. The aircraft, which has a maximum take-off weight of 53.5 tonnes and a maximum flight range of 4,500 km, will be used to fight forest fires and perform marine rescue missions. The AG600 is by far the world's largest amphibian aircraft, about the size of a Boeing 737. (Xinhua/Lu Hanxin)