Zhang Han transmigrated to the Three Kingdoms period and joined Cao Cao's camp. After awakening the "Merit System," he diligently trained in martial arts and fought bravely. By accumulating merits, he significantly increased his martial prowess before finally becoming the strategist he always aspired to be. However, what followed was unexpected. The system rewarded him with increased martial strength for his contributions, such as proposing new farming strategies, devising ambushes, and planning successful city conquests. As a result, during the Battle of Guandu, when Cao Cao's generals were defeated by Yan Liang, Cao Cao turned to Zhang Han and asked for his advice.