A biplane banking

A biplane in flight

A biplane in flight

Sea planes flying over Hong Kong

Six military aeroplanes in formation in the sky, Shanghai, August 1937

Crew and soldiers around Katherine Stinson's airplane, Jiangwan airfield, Shanghai

Katherine Stinson and her airplane, Jiangwan airfield, Shanghai

Katherine Stinson with crew and soldiers around her airplane, Jiangwan airfield, Shanghai

Katherine Stinson with crew, reporters, and soldiers around her airplane, Jiangwan airfield, Shanghai

Katherine Stinson's airplane in flight, Jiangwan airfield, Shanghai

Katherine Stinson with crew, reporters, and soldiers around her airplane, Jiangwan airfield, Shanghai

Onlookers watch an Italian aviation team preparing for the transportation of a 'Raid Rome-Tokyo' relay biplane, Shanghai

Three Douglas World Cruiser planes, taking part in the first flight around the world, on the Huangpu, Shanghai, June 1924

Three Douglas World Cruiser planes, taking part in the first flight around the world, on the Huangpu, Shanghai, June 1924

Douglas World Cruiser plane, taking part in the first flight around the world, on the Huangpu, Shanghai, June 1924

The 'Boston' Douglas World Cruiser plane, taking part in the first flight around the world, on the Huangpu, Shanghai, June 1924

Douglas World Cruiser plane, taking part in the first flight around the world, on the Huangpu, Shanghai, June 1924

Three Douglas World Cruiser planes, taking part in the first flight around the world, on the Huangpu, Shanghai, June 1924

Aerial view of Xi'an

Republic of China Airforce Vultee V-11 attack aircraft