Becoming Immortal in the Mortal World

After traveling to another world, the protagonist grows stronger by adding points each year. In his early years, his physical body was invincible, and he worked steadily as a constable, entrusted to care for the daughter of a deceased constable, Shu Qingran. Years later, an immortal master descended the mountain, found Shu Qingran who possessed great fortune, but judged the protagonist as having mortal bones without luck and unsuitable for cultivation. The protagonist did not seek divine weapons but instead obtained the Turtle Breathing Secret Skill, which allowed him to accelerate cultivation by burning his lifespan. He remained low-key and advanced steadily, repeatedly refusing to accept the destined protagonist's offer to become his master, and unintentionally turned the small town into a holy land of the martial world.