Photo taken on May 21, 2018 shows a cross-border e-commerce freight train in Xi’an, Northwest China’s Shaanxi province. The first cross-border e-commerce freight train from Hamburg of Germany arrived in Xi’an on May 21. [Photo/Xinhua]

Photo taken on May 21, 2018 shows a cross-border e-commerce freight train in Xi’an, Northwest China’s Shaanxi province. [Photo/Xinhua]