Customs officers inspect a China-Laos cargo train before its departure in Southwest China's Chongqing municipality, May 21, 2022. A cargo train carrying local foods and agricultural machines departed from a station in Southwest China's Chongqing municipality for Laos' capital Vientiane on May 21, marking the launch of the first China-Laos cargo train that enjoys a favorable quick entry and export channel. 

（source: Xinhua ）