A police officer patrols the square in front of Harbin Railway Station with a police dog on Jan 10, 2012. Two police dogs were dispatched to Harbin Railway Station for the Spring Festival travel rush. They will be on duty every day during the rush to help travelers enjoy a safe journey. [Photo/Xinhua]

Two police officers patrol Wenxi Railway Station in North China’s Shanxi province with dogs, Jan 9, 2012, the second day of this year’s Spring Festival travel rush. Linfen Railway Public Security Office has dispatched 45 police dogs to help railway police check for contraband items, such as drugs, during the Spring Festival rush. [Photo/Xinhua]