It is cutting-edge hypersonic “waverider” flight vehicle being developed by China.
Waverider is flight vehicle that flies in atmosphere and uses shockwaves generated by its own hypersonic flight with air to glide at high speed.
It can carry can carry both conventional and nuclear warheads.
It has capability to penetrate any current generation anti-missile defence systems due to its high speed and unpredictable trajectory.
As compared to it, current generation of anti-missile defence systems is mainly designed to intercept cruise and ballistic missiles which are either slower or easier to predict, making them possible to intercept.