Like other colonial powers, France considered
Vietnam as the source of natural resources and other essential commodities. It took following three steps to achieve the aim to exploit the natural resources of Vietnam and to build colonial economy.
These steps were
(i) The French began building canals and draining lands in the Mekong delta to increase cultivation.
(ii) A trans-Indo-China railway network was constructed. It linked the Northern and Southern parts of Vietnam and China.
(iii) The second link was built, linking Vietnam to Siam (Thailand) via the Cambodian capital of Phnom Penh. To ensure higher level of profit, French businessmen pressurised the government in Vietnam to develop the infrastructure.