He is the eighth child (as Southerners call it). His siblings include: Lam Thi Lap, Lam Thanh Van, Lam Thanh Chuong, Lam Thi Tri, Lam Van My, Lam Van Hoi and the youngest brother, Lam Tuyen Truong.

    His main name is Lam Thai. Due to appreciating King Thanh Thai's title, his family agreed with the chief of staff and changed his birth name to Lam Phai for ease of studying.

    As a child, in Tra Vinh, he studied at Nguyen Van Chuong Primary School. After that, he went to Saigon to study at Gia Long school (private high school, opposite the current Tao Dan park).

    Early in his patriotic spirit, when he went to Saigon, he participated in student movements against the French. On March 24, 1926, Mr. Phan Chau Trinh passed away. Mr. Lam Phai led students to break down the school gate to participate in a protest, mourning the death of Mr. Phan Chau Trinh. Due to this action he was expelled from school.

    A few years later (1929), his family took care of the procedures for him to study abroad in France.

    He studied at Lycée Montaigne in Paris and passed the full baccalaureate (Bachelier Deuxième partie) in 1936. In the same year, when he heard that his mother was sick, he immediately returned to the country.

    When his mother recovered from her illness, to show filial piety, according to Khmer custom, he asked for refuge at Ong Mat Pagoda, Tra Vinh province. Here, many times he directly fought and reasoned with local Western officials to protect national beliefs. Especially the struggle against taxing monks' bodies. He mobilized many monks and squirrels to come to the Provincial Chief's residence to pressure them to make concessions.

    Due to his history of fighting with the colonialists, after returning from secular life, the local Party Committee sent people to contact and connect with him as a basis for the Revolution. As an initial step, he organized the posting of posters and leaflets calling for the disbandment of the gathering. At the same time, he also made contacts and transferred secret documents and dispatches. The work of transferring official documents is very difficult at this time. The route from Da Loc to Luong Hoa to Song Loc was always inspected by the enemy, and only he was able to carry it out safely.

   In 1945, the August Revolution succeeded, Tra Vinh seized power, Mr. Lam Phai joined the Youth Pioneers, then was elected Vice Chairman of the Administrative Resistance Committee of Tra Vinh province (Chairman was Nguyen Van Tri). ).

    He was admitted to the Indochina Communist Party on April 4, 1946.

    During this period, as a leader and an ethnic intellectual, comrade Lam Phai contributed significantly to the Resolution of the Military and Civilian Council of Tra Vinh province. The resolution has 3 main contents, mainly "The Green Campaign and the National Liberation Revolution of the three Indochina countries. Mobilize the people and intellectuals of the nation to participate in the common revolutionary cause." At the same time, “Armed propaganda for the revolution to liberate the three nations. Armed against the French to protect production, protect property and people's lives."

    From the above Resolution, along with the prestige of comrade Lam Phai, many intellectuals, enlightened landowners, monks and Khmer people participated in the resistance, creating the basis for establishing the Association to support the First Soldiers. -sarak (Issarak) and the later allied Cambodian-Vietnamese armed propaganda team.

    In 1948, due to work requirements, the Party sent Comrade Lam Phai to Cambodia to take on the position of Vice Chairman of the Southwest Region, Member of the Cambodian National Affairs Committee and then Vice President of Cambodia (President Son Ngoc Minh). ). Active in Cambodia, he took the name Chan-Samay (moon of the era).

    In early 1954, he led a delegation of 16 senior Cambodian officials to Inter-Region 5 for re-education. At this time, to prepare for the Geneva Conference, the Cambodian Provisional Government was established and comrade Lam Phai was appointed to the position of Minister of Economics and Finance. However, later, because it was necessary to organize the Cambodian People's Revolutionary Party publicly, he did not attend the Conference.

    After the Agreement, comrade Lam Phai was directed by his superiors to organize the Khmer cadres and gather them in the North. This force has up to 1,400 people, including men, women, and children, from Song Doc (Ca Mau) following the Polish ship Kylinsky to the North and arriving at Sam Son wharf (Thanh Hoa). Here, together with Son Ngoc Minh, he organized the construction of Construction Site 900B in Trinh Dien so that the workforce could stabilize their work and study.

    In 1958, when construction site 900B moved to Phu Tho, comrade Lam Phai transferred to work at the Central Foreign Liaison Committee. From 1959 until his retirement (1975), he was Deputy Chairman of the Ethnic Committee of the Government Council and also a member of the Ethnic Committee of the Party Central Committee.

   He is a National Assembly Delegate of terms III, IV, and V in Lao Cai province.

   During the Revolutionary activities, he was awarded many noble orders and medals:

- Resistance Medal, first class.

- Coat of arms of the Fatherland.

- Class independent Medal.

- 40-year Party badge - 50-year Party badge.

    In 1961, his first-class Resistance Medal was signed by President Ho Chi Minh with the words "For his meritorious service in the nation's long and heroic Resistance."

    Having undertaken and completed many important tasks in the Governments of Vietnam and Cambodia, comrade Lam Phai is truly an outstanding Party member who has greatly contributed to the work of building great national unity and in the cause. liberated the country.