Si Ming clearly knows he doesn't have much time.
From the moment he stole the Supreme Treasure and escaped Hell, Fengdu would surely spare no effort in pursuing him until he is captured.
If it weren't for the tight schedule and the special circumstances that offered the chance, he wouldn't have planned to rush the theft and escape. Now, the Supreme Treasure has been in his possession for quite some time, avoiding Fengdu's repeated investigations, yet he still can't unlock the protective shield surrounding it.
Truly a headache for a ghost!
The courtyard by the Yellow Springs, whatever its purpose, is certainly Fengdu's handiwork.
Among the Three Realms, the Celestial Realm's collapse is of no concern; the Human Realm's human, demon, and devil cultivators are increasingly inept, lacking the ability to enter Fengdu and unseal the Old Underworld, let alone construct a courtyard under his nose.
Thus, it can only be Netherworld's most powerful Fengdu making moves.
