After Running Out of Options, I Went to Cultivate Immortality.

[The heroine has no CP] Her parents passed away one after another, and her sisters depended on each other for life. Her younger sister passed away due to accidents, so she had to embark on the path of cultivating immortality in order to bring her sister back to life... Through the experience, she became calm and decisive in killing, and the glimpse of the truth she accidentally glimpsed aroused her curiosity, and she investigated in depth... The truth outside the Three Realms, the rift in time and space, was her path led step by step?