Seeking modern cultivation novels, male lead, some mixed in the underworld (in the national army also have a temporary position)

Answer 1

The novels where the male protagonist mixed in with the underworld and held a post in the national army could be referred to the following modern cultivation novels:
[1. Library of Heaven's Path: The story of a cultivator who transmigrated to the modern world and used the Library of Heaven's Path to obtain various cultivation techniques and knowledge.] The male lead was originally a mafia figure but decided to give up his violent life after coming into contact with a cultivator. He had also taken up a post in the national army, using the resources and training of the army to continuously improve his spiritual cultivation ability.
[2]" Mortal Cultivation Biography ": It tells the story of an ordinary person who transmigrated to the modern world and began the path of cultivation. The male lead used to mix with the underworld in the early days of cultivation, but later decided to give up his violent life and become a cultivator. He also had a temporary position in the national army and received military resources and training to further improve his spiritual cultivation ability.
3." Tomb of the Gods ": It tells the story of a cultivator who traveled to the modern world and used the tomb to obtain various skills and knowledge. The male lead was originally a mafia figure, but after coming into contact with a cultivator, he decided to give up his violent life and become a cultivator. He had also taken up a post in the national army, using the resources and training of the army to continuously improve his spiritual cultivation ability.