The report of the 20th National Congress of the Communist Party of China clearly stated that "strengthen the study and education of military history, prosper and develop the strong military culture, and strengthen the cultivation of fighting spirit." Military history is the "family history" of our army and the best "textbook". In the past 10 years, Pu Yuan, a faculty member of the School of Military Basic Education of the Armed Police University of Engineering, has devoted almost all his spare time to the same thing - searching for revolutionary veterans and guarding the memory of military history. In Pu Yuan's view, it is an important subject to carry out ideological education that how to draw nourishment from the heavy history of the Party and the army and impress today's officers and soldiers with yesterday's story. Under his inspiration, a group of young soldiers joined in, gaining strength and inheriting spirit in touching history. In Xi'an in winter, the cold wind is blowing, but the atmosphere in a classroom of the Armed Police University of Engineering is warm and full of students from all disciplines who come to listen to the lecture in admiration. This lesson is Military History. The teacher is Pu Yuan, a volunteer and teacher who is looking for veterans. Why has a history class become the "hot money" of the school? Based on the experience of searching for veterans, Pu Yuan told us with great interest the scene of his investigation of the site of the Battle of Keti Mountain in Fengyuan Town, Chengcheng County, Shaanxi Province. The Battle of Ketaishan is the first battle of the Northwest Field Army to go south to Guanzhong, and it is also the prelude to the liberation of the Great Northwest. This part was temporarily added by him, without reference to the operational diagram and other materials. Pu Yuan quickly drew a battle sketch on the mobile whiteboard with a clear and specific image, which won the applause of the students. Looking for a visit. Race against time. Pu Yuan and the veteran are tied up. It will start from the winter of 2013. At that time, Pu Yuan, who was engaged in military history teaching, was writing an article on the history of the Anti-Japanese War. In order to clarify some obscure historical facts, he asked his comrades to contact several living veterans of the Eighth Route Army and the New Fourth Army. This was Pu Yuan's first face-to-face communication with people who had experienced the War of Resistance. Pu Yuan was deeply shocked by the experience of several veterans defending their country and fighting bravely against the enemy. At the same time, the old soldier's solicitude for the younger generation made him ponder: "Who will keep their stories when they are no longer in the prime of life?" The idea of looking for and caring for the old soldier quietly sprouted in his heart and took root from then on. After that, Pu Yuan joined the local volunteer team of caring for the veterans, opened a long way to search for the veterans, and forged an indissoluble bond with hundreds of veterans. "Teacher Pu, what unforgettable experiences did you have in the process of searching?" The students scrambled to ask. "It was a relatively accidental experience for me to visit veteran Hui Fengcai," Pu Yuan replied. During the May Day holiday in 2019, Pu Yuan was invited to attend the tombstone unveiling ceremony of a deceased anti-Japanese war veteran in Weinan City, Shaanxi Province. During the activity, Pu Yuan was sitting next to an elderly man with a dignified appearance and extraordinary bearing. After inquiry, it was learned that the old man named Hui Fengcai had returned from the Korean battlefield and had served in the 3rd Battalion, 8th Company, 1st Division, 1st Division, 1st Division of the Volunteer Army. After the event, Pu Yuan and his party hurried to visit the old soldier's home in Huifengcai. When introducing the old photos and objects to Pu Yuan, Hui Fengcai's thoughts returned to the war field of resistance to the United States and aid to Korea many years ago. Speaking of his interest, he picked up a wooden stick and began to demonstrate the stabbing action. It was as if he had done it in the same year