Its largest suppliers of steel and iron included China, Japan, South Korea and India, said the General Department of Vietnam Customs.

The coal sub-index slid 5.6 percent to 1,071.72.

An overhaul for the Datong-Qinhuangdao railway has been recently carried out on a daily basis to secure safe and smooth rail operations.

A total of 948 million tons of cargo was transported on China's railways in the period, 25.87 million tons more than that in the same period last year, according to the company.

Adjustments part of routine operation that will also boost shipments of coal.

Region boasts rich renewable energy resources and carbon sink capacity.

The railway construction project is slated for completion in 2023.

After completion, the logistics park's annual volume of transshipment cargo is expected to reach 16.2 million tons.