A soldier from Erenhot frontier inspection station guards at the No 815 boundary marker on Jan 25. The Erenhot frontier inspection station is the largest port of entry along the China-Mongolia border. Soldiers will continue guarding the northern gate of China to ensure a peaceful Spring Festival. [Photo/people.cn]

Soldiers from Erenhot frontier inspection station patrol the boundary line on Jan 25. The Erenhot frontier inspection station is the largest port of entry along the China-Mongolia border. Soldiers will continue guarding the northern gate of China to ensure a peaceful Spring Festival. [Photo/people.cn]