That is really doubtful. 10000 kilometer range? With a single MiG-21 engine? I don't think so.
Looking at the wing design it seems optimized for higher speed and altitude. To patrol up to the 2nd island chain not intercontinental.
Perhaps with WS-13 or better engine the range would improve. It has similar thrust and less fuel consumption. I don't know if it would fit though.
I am no aero dynamist but I think they have high aspect wing To sustain lift they split up 2 high aspect wing It is indigenous design. High aspect wing reduce drag. The video clearly explain this aspect of design
China showed off it's best military drones at 13th airshow: CH-6, WZ-7, WZ-8, GJ-11 and LJ-I (LJ-1)
High aspect ratio wings
Stability: Long narrow wings give a plane or bird more stability. (It’s a bit like a tightrope walker who holds a long pole across their body as they walk along the rope – the extra ‘arm’ lengths help to balance the body by adding more mass to either side of it.) The trade-off is that this type of plane won’t be very manoeuvrable.
Rights: The University of Waikato Te Whare Wānanga o Waikato
Balancing
Tightrope walkers hold a long pole across their body as they walk along the rope to help balance their body by adding more mass on either side.
Less induced drag Long, narrow wings also have less induced drag than shorter wider wings. Induced drag is created at the tips of the wings where the high pressure air from beneath the wing comes up over the wing tips into the low pressure zone. This meeting place of different air pressures becomes a turbulent area creating induced drag. Long narrow wings have less end edges (tips) and more stable wing area than shorter wider wings so they have less drag.
Less fuel consumption: Having less induced drag means there is less fuel consumption for planes and birds (fat consumption) so they can keep their speed for a longer time than short wide-winged fliers.
High aspect ratio wings have less induced drag
Long narrow wings have less end edges (where turbulence occurs) and more stable wing area than shorter wider wings so they have less drag.