Well, this jet is not a sign of Chinese innovation. J-20 is far more original and is optimized for its role, this jet isn't. It carries over all the design defects of F-35 and make it worse by putting two engines in, which reduces fuel capacity and range. The F-35 is aerodynamically compromised to achieve SVTOL, and no conventional jet needs to replicate those compromises, yet Chinese did just that.
The F-35 was the worst fighter jet out of the US aerospace industry in 40 years(Before that, the worst was F-104, another Lockheed product), and Chinese copied that with stolen data..