A cargo container of China Railway Express is loaded on a truck at a storehouse for packing and unpacking containers in Hamburg, Germany, on May 29, 2018. Hamburg, Europe's second largest port and also one of the important slots of China Railway Express (CRE), has played a significant role in the Belt and Road Initiative over the past few years. (Xinhua/Shan Yuqi)

Photo taken on May 29 ,2018 shows a view of a storehouse with import and export goods of China Railway Express in Hamburg, Germany, on May 29, 2018. Hamburg, Europe's second largest port and also one of the important slots of China Railway Express (CRE), has played a significant role in the Belt and Road Initiative over the past few years. (Xinhua/Shan Yuqi)

A China Railway Express train reverses into Eurokombi terminal in Hamburg, Germany, on May 29, 2018. Hamburg, Europe's second largest port and also one of the important slots of China Railway Express (CRE), has played a significant role in the Belt and Road Initiative over the past few years. (Xinhua/Shan Yuqi)

A cargo container of China Railway Express train is loaded on a truck at Eurokombi terminal in Hamburg, Germany, on May 29, 2018. Hamburg, Europe's second largest port and also one of the important slots of China Railway Express (CRE), has played a significant role in the Belt and Road Initiative over the past few years. (Xinhua/Shan Yuqi)

A cargo container on a China Railway Express train is unloaded at Eurokombi terminal in Hamburg, Germany, on May 29, 2018. Hamburg, Europe's second largest port and also one of the important slots of China Railway Express (CRE), has played a significant role in the Belt and Road Initiative over the past few years. (Xinhua/Shan Yuqi)

A cargo container on a China Railway Express train is unloaded at Eurokombi terminal in Hamburg, Germany, on May 29, 2018. Hamburg, Europe's second largest port and also one of the important slots of China Railway Express (CRE), has played a significant role in the Belt and Road Initiative over the past few years. (Xinhua/Shan Yuqi)

A cargo container of China Railway Express is lifted at a storehouse for packing and unpacking containers in Hamburg, Germany, on May 29, 2018. Hamburg, Europe's second largest port and also one of the important slots of China Railway Express (CRE), has played a significant role in the Belt and Road Initiative over the past few years. (Xinhua/Shan Yuqi)

Photo taken on May 29, 2018 shows a cargo container on a China Railway Express train at Eurokombi terminal in Hamburg, Germany. Hamburg, Europe's second largest port and also one of the important slots of China Railway Express (CRE), has played a significant role in the Belt and Road Initiative over the past few years. (Xinhua/Shan Yuqi)

Goods are loaded into a cargo container of China Railway Express at a storehouse for packing and unpacking containers in Hamburg, Germany, on May 29, 2018. Hamburg, Europe's second largest port and also one of the important slots of China Railway Express (CRE), has played a significant role in the Belt and Road Initiative over the past few years. (Xinhua/Shan Yuqi)