The Fourth Congress of the Communist Party of Vietnam was held from December 14-20, 1976 in Hanoi. Comrade Le Duan was elected as General Secretary of the Central Committee of the Communist Party of Vietnam (Photo: VNA) 
Vinatexco textile factory workers actively restored production from October 1975 (Photo: VNA) 
The restoration of the North-South railway line (1976) (Photo: VNA) 
The first Thong Nhat train departs at Hanoi Railway Station on December 31, 1976 (Photo: VNA) 
Voters of Ninh Son district, Thuan Hai province (now in Ninh Thuan province) voted for the National Assembly reunification in 1976 (Photo: VNA) 
On January 4, 1977, the Thong Nhat train from Ho Chi Minh City arrived at the Hanoi railway station in the joys of the capital's people (Photo: VNA) 
Producing automobile tires at Sao Vang Rubber Factory (1977) (Photo: VNA) 
The soldiers fight to protect the southwest border (1978) (Photo: VNA) 
Farmers in Dong Hoa commune, An Bien district, Kien Giang province sell rice to the state (August 1978) (Photo: VNA) 
On the construction site of Hoa Binh Hydroelectric Plant (1979) (Photo: VNA) 
Tet Flower Market in Hanoi in the early 1980s (Photo: VNA) 
Acting President Nguyen Huu Tho signs the Ordinance announcing the new Constitution, December 1980 (Photo: VNA) 
September 2 Pharmaceutical Enterprise (Photo: VNA) 
On the construction site of Pha Lai Thermal Power Plant (1982) (Photo: VNA) 
Giang Vo area, Hanoi (1985) (Photo: VNA) VNA
