Lâm Đức Thụ
Lâm Đức Thụ (chữ Hán: 林德樹; 1890 - 1947) was a revolutionary activist against the French who later became an informant for the French secret police, who is believed to have betrayed Phan Bội Châu to the French colonialists and also the person whom the Chinese side believed to have introduced Zeng Xueming to Nguyễn Ái Quốc.
Lâm Đức Thụ whose real name was Nguyễn Công Viễn (阮公遠), also known by the nickname Trương Béo or the pseudonym Hoàng Chấn Đông (黃振東), was from Thái Bình province. He was the son of the scholar Nguyễn Hữu Đàn and the grandson of the patriotic Confucian scholar Nguyễn Mậu Kiến. Lâm Đức Thụ passed the provincial examination with the highest score.
In 1912, Lâm Đức Thụ joined the Việt Nam Quang Phục Hội of Phan Bội Châu.
In 1923, dissatisfied with the conservative ideology of the older generation, Lâm Đức Thụ along with a number of enthusiastic young people such as Lê Hồng Phong, Hồ Tùng Mậu, Lê Hồng Sơn, Phạm Hồng Thái, Nguyễn Giãng Khanh, Đặng Xuân Hồng, broke away from the Việt Nam Quang Phục Hội and established a more progressive organization called Tâm Tâm xã.
In 1925, Lâm Đức Thụ and several comrades founded the Vietnamese Revolutionary Youth League, a revolutionary organization that emerged from the Tâm Tâm xã. Lâm Đức Thụ had a Chinese wife named Li Huiqun (some documents call her Liang Huiqun). The house of Li Huiqun's family on Guangzhou, was where the first generation of revolutionaries of the Vietnamese Revolutionary Youth League resided and received training in revolutionary theory and mass mobilization work. Some authors believe that while operating in China, Lâm Đức Thụ and Lý Thụy betrayed Phan Bội Châu to the French.[1]
In 1947, after being discovered to be an "informant", "spy" and "lackey for the French", Lâm Đức Thụ was assassinated by militiamen in his hometown of Thái Bình province.