World War II-era planes are seen at an expo in Dalian city, Liaoning province on September 15, 2017. More than 20 World War II-era aircrafts are on display, including not only World War II service fighters, but also China's early fighters and a wide range of private aircrafts. A variety of aviation airplanes and equipment made by Boeing, Beiqi aircraft company, Cessna aircraft company and others are also on display. The expo will last until the end of October. [Photo/IC]