we don't even know exist. There are strong and weak ones. Whether it's external enemies or internal struggles, learn from history, live in the present, and focus on the future. You are a book, and I..." The spirit turtle's apparition flickered in and out, clearly agitated."Cough." Lu Cheng coughed up a mouthful of blood, propped himself up with his hand, and tried to stand up but couldn't, so he ha...