In 2019, China will start deploy J-20B stealth fighters with a new Xian WS-15 jet engine. This engine could finally bring China to about the engine performance level of the US PW-119 engine that were installed over 20 years ago in the F22.
The US has jet engines programs to improve and the power and fuel efficiency of engines compared to those used in the F22.
China is continuing to refine the stealth and various component and systems in their J-20 and J-31 stealth fighters.
China is also continuing to upgrade and improve stealth technology and engines in large stealth drones.