The largest land port on the China-Russia border — Manzhouli in the Inner Mongolia autonomous region — recorded 678 returned China-Europe freight trains in the first quarter of this year, a year-on-year increase of 7.1 percent, according to China Railway Harbin Group recently.

The trains handled a total of 70,750 standard shipping containers, a year-on-year increase of 5.3 percent, marked a record high for the same period and ranked first in terms of freight volume among China-Europe railway lines across the country, it said.