The ancestral home is Zhangbantun Village, Jinhaozhuang Township, Qingping County, Shandong Province (now part of Linqing City). He was born into a bureaucratic family in Shashi County, Hubei Province on December 20, 1892 (the second day of winter in the eighteenth year of Guangxu's reign in the Qing Dynasty). His father's name was Qin Tai, who was the supervisor of the construction of the local Yangtze River embankment, and his mother was Peng. Lu Ji was born three years ago and had half-brothers and one sister. Since Lu Ji was born in a bureaucratic family, he had been influenced by the Four Books and Five Classics since he was a child, and had a strong interest in astronomy, history, geography, Buddhist scriptures, calligraphy, compilation, etc. After Lu Qintai resigned and moved his family back to his hometown, Lu Ji was admitted to the Army Primary School in Nanguan, Jinan, with the recommendation of the county magistrate, and then was promoted to the third phase of the Army No. 1 Preparatory School in Qinghe, Beijing. In the summer of 1916, Lu Ji received six months of enlistment training after graduating from the preparatory school. In March 1917, he was promoted to the sixth phase of Baoding Military Academy, where he studied artillery and was assigned to the 2nd Artillery Company. During his schooling, Lu Ji had a close friendship with Shangguan Yun, a classmate of the Infantry Department. The two jointly initiated the establishment of the "Classmate Academic Research Association" with the aim of uniting like-minded people to strengthen each other. There are more than 60 classmates from the fifth and sixth batches who have joined the membership. Among the more famous ones are Zhao Chengshou, Lan Xiangshan, Zhang Yinwu, Yan Yan, Niu Yuanfeng and others from the fifth batch, and Yu Hanmou, Gu Zhutong, Ye Peng, Qiu Zhaochen, etc. from the sixth batch. Gan Fang et al. At first, members of the research association met once a month in a restaurant, where Lu Ji and Shangguan Yunxiang gave speeches. Later, everyone paid to rent a private house, and the participating members began to meet once a week, including dinners, heart-to-heart talks, and poetry recitations. , encourage each other, etc. However, since the seminar had no leader, it turned into a gathering group over time. As a result, the gatherings gradually decreased and eventually disbanded invisibly.
In addition to the students of the third batch of Qinghe Army First Preparatory School, the sixth batch of students of Baoding Military Academy also includes the second batch of students of Wuchang Second Preparatory School and the second batch of model regiment run by Yuan Shikai. soldiers. Because the students of the Model Regiment were born differently from the officers and students, the two factions often had disagreements, which gradually evolved into armed fights. After the incident occurred, principal Yang Zude and Chief of Education Liu Ruxian sent people to mediate many times, but still could not stop it. The cadets of the Model Regiment were kicked out of the school alone, and then they faced off with the military cadets outside the school. Both sides set up their own sentries, and things got out of hand. Finally, Yang Zude asked the Ministry of War to expel the students who caused the trouble from both sides, and then the matter was settled. Although Lu Ji was unavoidably involved in this incident, the school handled it properly after the incident, allowing all the students to complete their studies with peace of mind. There are 1,333 graduates in the sixth batch, which is the largest number of graduates in any batch. These graduates will have their own development in the future military circles. There are many who have achieved success and fame, even among the 148 graduates of the Artillery Department. People who were promoted to generals include Fan Guozhang, Yu Fanggao, Guo Chiping, Fu Zhengli, Cai Shengxi, Guo Chan, Shen Yingshi, Yan Erai, Deng Hui, Fang Keyou, Wen Kegang, Shao Baichang, Liang Shiji, Zhang Yujue, Ha Jinjia, etc.