[theold]

In a lengthy joint declaration in December, both countries said they would work on cross-border railway connectivity, naming three rail projects that included one connecting through mountainous Lao Cai in the Vietnam's northwest to the port city Haiphong and a potential one linking China's Shenzhen to Haiphong. 

Vietnamese officials had said rail links would be high on the agenda when the top leaders meet.

The two nations are connected by two railways from southern China to Vietnam's northern industrial hub and capital Hanoi, but the Vietnamese infrastructure dates back to French colonisation and has a different gauge from Chinese high-speed rail, forcing passengers and goods to swap trains at the border.

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