Ascend to Bai Yujing, I Became a Monster

My name is Chen Gou, a low-level miner who has been digging underground for twenty years. One day I dug up a bone slip with the method of cultivating immortality written on it. I thought I had become an immortal, living without eating grains and only absorbing the spiritual energy of heaven and earth. . I don't know who is crazy, but I am sure that Bai Yujing's door has been opened for me.