China's homegrown large amphibious aircraft AG600 has successfully completed its maiden flight over the sea in the coastal city of Qingdao, east China's Shandong Province. 

Codenamed Kunlong, AG600 is the world's largest amphibious plane and the first large specialist civil aircraft independently developed by China to meet the needs of emergency rescue and natural disaster prevention and control efforts. 

The 37-meter-long plane is around the size of a Boeing 737 and has a wingspan of 38.8 meters. It has a maximum take-off weight of 53.5 tons and a maximum flight range of 4,500 kilometers.