A Chinese freight train bound for Iran's Tehran departs from the Yinchuan South Railway Station in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, Sept. 5, 2017. The launch ceremony of the international freight train from Yinchuan to Tehran was held here on Tuesday. (Xinhua/Li Ran)

A freight train is to leave northwest China's Yinchuan for Iran's Tehran, at the Yinchuan South Railway Station in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, Sept. 5, 2017. The launch ceremony of the international freight train from Yinchuan to Tehran was held here on Tuesday. (Xinhua/Li Ran)