ERENHOT, Sept. 4 (Xinhua) -- Erenhot, the largest land port on the China-Mongolia border, is a pivotal entry-exit point for the central route of the China-Europe railway service. As of Sept. 3, inbound and outbound passenger traffic volumes and the number of vehicles driving through Erenhot reached 1.976 million and 512,000, respectively, up by 13.2 percent and 16.6 percent as compared with the same period of last year.