Chen Yan traveled through the Three Kingdoms and became a useless soldier under Cao Cao. During the Battle of Guandu, he was shot by a stray arrow and was on the verge of death. The "Three Kingdoms War Immortal System" was activated, and he was given a "food protection mission" and a "Qi Refining Technique" as a gift. He used the "Spiritual Plant Seeds" provided by the system to grow high-yield military rations, set up a "Misty Array" to intercept Yuan Shao's rationing team, and relied on the "War Spirit Armor" unlocked by the system to overwhelm enemy generals, help Cao Cao win Guandu, and be promoted to Sima of another department.
