The Lost Immortality of Tao

After taking the college entrance examination, Li Xiaoyang almost died during an ordinary fishing trip. After waking up, he was in a different world. The person I met for the first time was still an immortal, but since he had no talent for cultivating immortals, he was willing to accept new experiments. After the experiment, he discovered that the world was much worse than he imagined, including his immortal master who was also malicious towards him. How should he survive in this world? Can he still go home?