In 1988 a classified Vietnamese Ministry of Public Security’s in-house professional journal published this article offering ideas on how to utilize the “psychological characteristics” of the ethnic Chinese in the interrogation of suspected “Chinese spies”.  At the time the article was published, the once-close alliance between the Vietnamese and Chinese Communist Parties, which Mao Zedong described in 1967 as being “as close as between lips and teeth”, had deteriorated into a vicious military and political conflict between the two former allies.  Chinese efforts to collect intelligence on and to foment internal opposition against the leadership of the Vietnamese Communist Party were of special concern to Vietnam’s security service, and ethnic Chinese residents of Vietnam naturally became a primary focus of Vietnam’s counter-espionage efforts.

Trần Quốc Hoàn reviews cases against foreign and domestic spies in the Vietnam Wars.

North Vietnamese Deputy Prime Minister and Politburo member Le Thanh Nghi recounts his discussions with socialist leaders in the summer of 1965, just as the war in the south was heating up.

The Vietnamese Foreign Ministry accused China of uncooperative attitude in negotiation on the Chinese-Vietnamese war. They regarded China's eight-point solution as an attempt to interfere in the internal affairs of Cambodia and Laos rather than on the immediate issue of Chinese-Vietnamese relations. Vietnam put forward its own three-point solution and asked China to join them in a serious new round of negotiation.

The Vietnamese government denounced the Chinese invasion on February 17, 1979.

Speech by Comrade B (Le Duan) regarding the plot of reactionary Chinese clique against Vietnam. The document illuminates the views and attitudes of Vietnam's top leader in the crisis year 1979, and also some aspects of the situation within the socialist camp at that particular juncture.