China's J-20 Stealth Fighter: Just a Stolen F-35?

J-20 - Did the Chinese Steal Secrets For One Of Their Favorite Fighter Planes?:

When it looks like a copy, maybe it is a copy. The Chinese are proud of their J-20 Mighty Dragon fighter – probably because they received some of the technology for free.

Some believe the Chinese stole parts of the design in at least one cyber breach.

The J-20 and F-35 show a resemblance that jumps out at you, especially when you examine the front of the airplane, which looks similar to each other.