The 554.7-kilometre railway would link Vientiane, the capital of land-locked Laos, with Vung Ang Port in Vietnam's central province of Ha Tinh, Deoca said in a statement.

The railway would also be connected to the $6-billion high-speed rail line from China's Kunming city and Vientiane that opened in December 2021, according to the statement.

It didn't provide a time frame for the construction of the railway nor how the companies would fund the project.

($1 = 23,710 dong)

(Reporting by Khanh Vu; Editing by Sharon Singleton)