Lu Yuanjiu (9 January 1920 – 6 June 2023) was a Chinese physicist. He was a member of the Chinese Academy of Sciences and Chinese Academy of Engineering.

Lu was born in Chu County, Anhui, on 9 January 1920.^[1][2] His father was a teacher. He attended the Anhui Provincial No. 8 Middle School and Jiangsu Provincial Nanjing High School, and in November 1937 was accepted to the National Central University.^[1] That same year, the Imperial Japanese Army occupied north China and he escaped to Chongqing, where his university had relocated.^[2] In 1945, he pursued advanced studies in the United States on government scholarships.^[2] He earned his doctor's degree at Massachusetts Institute of Technology under the direction of C. S. Dreber.^[1][2] After graduation, he became an associate research fellow at the institute.^[2] In January 1954, he joined a scientific laboratory at Ford Motor Company as an engineer.^[2]

Lu returned to China in 1956, and that same year became vice dean of the Institute of Automation, Chinese Academy of Sciences.^[2] In 1966, Mao Zedong launched the Cultural Revolution, and during this period Lu was criticized, deprived of all his work, and forced to perform farm work at the May Seventh Cadre Schools.^[2] He moved to the 520th Research Institute of National Central University in January 1968^{[citation needed]}, and was promoted to director of the 13th Research Institute in January 1978.^[2] In January 1984, he became a member of the Standing Committee of Science and Technology Committee of Ministry of Astronautics Industry.

Lu died on 6 June 2023, at the age of 103.^[3]

• 1980 Member of the Chinese Academy of Sciences (CAS)
• 1994 Member of the Chinese Academy of Engineering (CAE)
• 1997 Science and Technology Achievement Award of the Ho Leung Ho Lee Foundation
• 2021 July 1 Medal