A staff member unloads a reefer container from a China-Europe freight train at Liege Logistics Intermodal in Liege, Belgium, Aug. 31, 2021. It is introduced that some goods on the train come from Vietnam. They first took the China-Vietnam train from Vietnam's Hanoi to China's Zhengzhou. Later they were transferred to the freight train linking Zhengzhou and Liege in Belgium. (Xinhua/Zheng Huansong)