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A teacher preaches, teaches, and resolves doubts. Lin Fei is a "mentor" who systematically teaches all kinds of lost knowledge in various realms, including martial arts, medical skills, military strategies, Qimen Dunjia, meditation, immortality cultivation, and so on. However, the power of a "teacher" is limited, and he will inevitably encounter various challenges in the process of preaching. Therefore, during the process of preaching, Lin Fei can only force himself to study hard to avoid losing face in front of his disciples. Many years later, Lin Fei, who was now at the pinnacle of all realms, suddenly looked back and recalled the disciples who were so powerful in the world. He couldn't help but sigh with emotion. It was he who had made them successful, but they had also made him successful.