Awakening on the Path to Immortality, Signing for the Express Delivery from the Underworld at the Beginning

Xu Zhan received the express delivery! This is normal! What's unusual is that the address says it's a courier from the underworld? ? ? I received a courier from the underworld, what happened... What on earth is going on. The sender is actually his deceased grandfather? From then on, Xu Zhan often burned incense for his grandfather, burned paper villas, burned this and that... Instead, grandpa sent him a bunch of express delivery from the underworld. It doesn't matter, he is very "filial" anyway... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.