Argentina has agreed to borrow around 6 billion euros from China to build hydroelectric dams in the Patagonia region.
The loan from the China Development Bank will also fund a long-delayed railway project in Argentina.
The two countries signed a similar deal in 2009.
China is Argentina’s second-largest trading partner after neighbouring Brazil.
Argentina is the world’s third-largest exporter of soy and corn. China is the mail buyer of its soy beans.