At first, Li Yuan thought this was a star map, but soon he noticed something was amiss.
If it were indeed a regular star map, it likely wouldn't have survived and would have been destroyed by Xia Hao, the Heavenly Divine, before his death.
It should be understood that in battles between mighty beings, if one party sees no hope for survival and has time, they often frantically destroy the treasures they carry, unwilling to let the enemy benefit.
Thus, after great battles, only treasures difficult to destroy quickly tend to remain.
Items like star maps and messaging Divine Artifacts are usually hard to preserve, given that a single thought from a Heavenly Divine can instantly obliterate even Pseudo-God Artifacts.
Moreover!
If it were star map information, why would it be so troublesome?