Measures taken to ensure security of coming travel rush (4/4)

A policeman guides a dog to exercise a drill of seeking out explosive devices and materials held at Yinchuan train station in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, Jan. 9, 2014. Several measures have been taken to ensure the security of Spring Festival travel rush, as China's transportation system has to undergo a challenge during every Spring Festival holidays. (Xinhua/Peng Zhaozhi)