China's prototype stealth fighter, the J-20, has made a rare appearance on screen after a brief shot of it was included in a new Chinese air force recruitment video.
The J-20 had its first test flight in early 2011 - at the same time then-US defence chief Robert Gates was visiting China - but since then few images of it have surfaced.
In the air force video, entitled "Heroes' Sky" and released on Thursday on Chinese video-sharing websites, the aircraft can been seen very briefly taking off, interspersed between other images of older fighters amid stirringly patriotic slogans.
"The new fighter jets call for new-generation ... flying stars," air force spokesman Shen Jinke told the official Xinhua news agency in a report carried on Friday.
"The film shows the air force's role in safeguarding state security and maintaining military strategies, and as a responsible great power, China needs to build an air force to maintain regional stability and world peace," Shen added.
The six-minute film is split into three parts, called "The sky needs you", "The future belongs to you", and "The nation calls on you".
While China is still only in the early stages of testing stealth technology and any deployment is likely years away, it could eventually help narrow the military gap with the United States.
However, the latest pictures may heighten concern about China's military build-up as it presses its claims to most of the South China Sea, including the deployment of its first aircraft carrier and new anti-ship and anti-satellite ballistic missiles.
Some analysts have said that the J-20 photos suggest that China may be making faster-than-expected progress in developing a rival to Lockheed Martin's F-22 Raptor, the world's only operational stealth fighter designed to evade detection by radar.