Takeshita Changsheng: the Master's Record of Disciple Recruitment

Chen Zhuo lived in seclusion in Tingfeng Valley, and through the system he took in people, demons, monsters and immortals who had lost their families and died as his disciples. He doesn't teach revenge, he only teaches how to live happily. Every apprentice will experience death (death of old age or disaster), which makes the protagonist deeply regretful; but after death, he will be resurrected like waking up from a dream, losing his past and gaining a happy new life. One sentence summary: The Immortal killed the believers and witnessed the miraculous resurrection after the separation of life and death.