In 1923, Lưu began working in the office of experimental
sericulture in Đông Ba, . He was transferred to
Diễn Châu District, Nghệ An, in 1925. He also worked in Linh Cảm,
Hà Tĩnh Province, in Phú Phong,
Bình Định Province, in
Đà Lạt and Di Linh,
Lâm Đồng Province. Wherever Lưu went, he would be non-chalant about his anti-colonialistic views. This eventually led to his dismissal. He used this opportunity to immerse himself in the study of communist and anti-imperialistic writings such as Marx's
Le Capital or '''' by
Nguyễn Ái Quốc. By that time, he had already been involved in the political movement
Hội Phục Việt. On July 14, 1928, at the general plenum of the
Tân Việt Revolutionary Party, Phan Đăng Lưu was voted as a standing member into the central committee of the party, responsible for revolutionary propaganda that included the propagation of a new democratic order and the socialist doctrine. In this function, together with
Đào Duy Anh and other members of the Tân Việt Revolutionary Party he co-edited, translated, compiled several works under the party's publishing organ . It comprised works such as the A.B.C. of Marx's Doctrine ("A.B.C Chủ nghĩa Mác"), New Democracy ("Dân chủ mới"); translations of works such as Social Essays ("Xã hội luận"), A History of economic teachings ("Lược sử các học thuyết kinh tế") or
The Communist Manifesto ("Tuyên ngôn Đảng Cộng sản"). Upon his release from prison in February, 1936, prior to the end of his full sentence due to a democratic and human rights movement in
Indochina and France that had formed for the release of political prisoners, Phan Đăng Lưu was admitted into the Communist Party's Committee of Middle Vietnam (Xứ ủy Trung Kỳ). Together with ,
Hải Triều, Lâm Mộng Quang, Trịnh Xuân An, Hải Thanh and others he was tasked with taking the Party's political activities into the legal and open sphere of influence. Therefore, Phan Đăng Lưu edited and published many articles in newspapers such as Sông Hương tục bản, Dân, Dân Tiến, Dân Muốn under various pen names such as Đông Tùng, Phi Bằng, Bằng Phi, Sông Hương, Tân Cương, Ly Toét, BCH, QB, SH, KD, Mục tiêu, Thương tâm, KĐ, etc. In September 1939, Lưu was assigned to move into South Vietnam continuing to lead the party's underground revolutionary activities. In November 1939, at the VI general plenum of the Communist Party's
1st Central Committee, he was admitted as a standing member into the Central Committee ("Ban Thường vụ Trung ương"). The Standing Committee of the Central Committee was the predecessor of the
Politburo. At this point in time, he was one of the highest-ranked political members of the Communist Party of Vietnam. At the VII general plenum of the Communist Party's 1st Central Committee in November 1940, he advised to postpone the planned uprising in South Vietnam. On 22 November 1940, on his way back to Saigon, Lưu was caught and sentenced to death on 3 March 1941. He was executed along with Nguyễn Văn Cừ, Nguyễn Thị Minh Khai, Hà Huy Tập, Võ Văn Tần and Nguyễn Hữu Tiến in Bà Điểm commune,
Hóc Môn District, Saigon, on 28 August 1941. == Memorials==