The J-31 - China's F- 35

The Chinese exploited vulnerabilities in BAE's
computer defences to steal vast amounts of data on
the $300 billion F-35 Joint Strike Fighter, a
multinational project to create a plane that will
give the West air supremacy for years to come,
according to the sources.
The hacking attack has prompted fears that the
fighter jet's advanced radar capabilities could have
been compromised.
The J-31 is designed to have a stealthy shape. "From
the side profile, it really looks like a 75% (scale)
F-22 from the bottom, and the top profile it very
much looks like an F-35."

The J-31 may have the stealth coatings that help it
absorb radar signals instead of letting them bounce
off and give away its position.
Estimations the J-31 might become a threat in 2027.
You would expect to see the Chinese stealth fighter
enter operational service, 15 years from now.Another
estimate is that the J-31 will start entering
squadron service in four to five years.