Delivery Man From Murim

Briefly about Delivery Man From Murim manga:

The martial god of the Murim becomes a super-fast delivery man!
Before even reaching the age of forty, the martial god “Kang So” had conquered the world. While he was in the midst of consolidating his energy after reaching enlightenment,
he suddenly descended into a newly formed rift…
He arrives in 21st century South Korea, a land desolated by gates and demonic beasts. Here, the martial god from the martial world, now a delivery man, shall bring peace!