Previous life: Code-named "Lone Wolf", a top special forces king with strong skills and proficient in many skills such as fighting, wild survival, tracking, shooting (cold weapons/firearms), reconnaissance and counter-reconnaissance. He has a resolute and decisive character, but is a bit emotionally slow. Due to his long military career, he is slightly indifferent to the world and has left regrets in his past life.
- After rebirth: Back in 1975, an educated youth affiliated to a production and construction corps in Northeast China became Li Huailin, an educated youth who had just gone to the countryside. With the memories of his previous life and top military skills, he is determined to make up for the debt he owed to the heroine in his previous life, protect her, improve his life, and live a different and wonderful life in this special era.
