After it first broke cover in 2021, the J-20S two-seat stealth fighter jet’s existence has now been officially confirmed and a scale model has also been

China's much-anticipated J-35A stealth aircraft, centrepiece of this week's Zhuhai air show, has been more than a decade in the making, but experts say little is known about its capabilities.

The J-20S is the first twin-seat fifth-generation stealth fighter, with rivals such as the US maintaining single-crew platforms.