Chinas new supersonic drone may be a signal, a reminder on what Iran should do in regards of heavy airpower.
This is a missile and less so a aircraft.
Iran's biggest bottleneck, the necessary jet engines for a persistent supersonic bomber/interceptor may be skipped to go for something similar to the newly disclosed Chinese drone.
What is called Aurora and was/is used as black project asset by the U.S most likely a rocket motor powered Mach 3-6 reconnaissance aircraft. It developed into the black world after the success with the X-15 test aircraft.
Hence we see that Russians were working on jet engine powered heavy mach 3 airpower and the U.S developing a jet-ramjet hybrid for their mach 3 airpower, the SR-71.
The U.S then also went beyond that for high value, long range, heavy airpower from what rumors tell (Aurora), manned or unmanned.
The new Chinese drone seems to be their reaction after seeing the Aurora employed against them.
Maybe the Chinese just sticked to a rocket-motor-only solution due to the lack of a suitable jet engine, maybe the black U.S solution also lacks a jet engine propulsion component.
For Iran it means that all its knowledge on liquid rocket motors could be used in such a project. It also means that all its knowledge on MaRV could be used for the aerodynamics and airframe/materials. Plus all knowledge from unmanned systems could be used for a unmanned solution.
Iran also has large aircrafts such as the Tu-154 to bring it up and to speed before it starts accelerating via a throttleable liquid motor or strap-on booster(s) (from mach 0,9 to 4-5). Iran is not well known for its liquid rocket motors but may be able to kick something like this off by now, maybe first with very low re-use cycle life.
Is titanium a must for such a mach-3-6 system? I think not, composites etc. could take that role.
Such a system would then be immune or very robust to currently employed air and SAM power of any regional adversary of Iran.
Air launch instead of missile/ground booster launch would make its early (IR) detection unlikely.
Payload would be sufficient for heavy bombing role.
Range would be depending..., because oxidizer is carried on-board but could be sufficient for regional employment. The motor(s) would just sustain friction losses and allow landing.
It also means however that the Chinese disclosure and its connection to the U.S has the message for Iran that such back project assets create a strike-at-will capability for the U.S.
What is called Aurora may be a bomber too and depending on range, starting concept, payload, numbers, may represent a true critical danger against Irans non-hardened military assets.