New long-range strategic bomber designs (H-X) have been explored at 603 Institute/XAC since late 90s. One configuration was a supersonic bomber with a conventional (delta wings with canards?) design, another was a 4-engine stealth flying wing design similar to American B-2. Scale-down models were built. The final configuration selected by PLAAF which will go into full-scale development seems more likely to be the flying wing design. The engine could be the modified WS-10 without A/B. The aircraft is expected to carry CJ-10K/CJ-20K ALCMs internally on a rotary launcher. H-X is believed to be able to evade modern air defence systems and penetrate deep into the enemy territory. The latest news (March 2013) suggested that the development of H-X (referred to as the "strategic project") is gaining full speed at 603/XAC after the successful flight of Y-20.