This is a biography of Zhao Zilong who traveled to Changshan. This is not a story about a king and his ministers getting to know each other. This is the regret that a loyal minister and an emperor understand each other but can never fulfill each other. "Preparation for Use" takes the unique perspective of Zhao Yun, a time traveler whose soul is possessed, and retells a heroic epic in the troubled times of the Three Kingdoms that has been understated in history books. The protagonist falls into Changbanpo in the 13th year of Jian'an in the 21st century. He takes over Zhao Yun's remains in a mountain of corpses and a sea of blood. He fights to protect his young master Liu Chan with seven in and seven outs. However, on the river beach, he sees with his own eyes Liu Bei's imperial mentality and cold trade-offs when he throws his son in public. In the forty years since then, under the name of Zhao Yun, he has lived through every Northern Expedition, every remonstrance, and every period of alienation from his colleagues. He has defended Chengdu, protected the people, and stopped conquests. In a situation where he has never been completely trusted, he has kept the "promise" in his heart. Until he was buried at the foot of Jinping Mountain in the 15th year of Jianxing, the soul of the time traveler separated from his body and floated on the peach blossoms in the mountains. He looked back on his forty years of military career - he did not seek fame or favor, but only wanted to let the general who has only a few words in the history books live with more warmth and let the people's eyes shine when they talk about "General Zhao".
