2020年4月15日，5630次列车上，乘客观看网络热播视频——《慢火车重现往日繁忙》。5629/30次列车是中国铁路成都局集团公司为方便老川黔线沿线村民和小站职工通勤而开通的慢火车。从20世纪70年代开始运行，沿线附近及周边都是贫困地区。慢火车对深山里的村民来说，是一条“生命线”，更是一趟脱贫致富的列车。

Passengers on the No. 5630 train watch a hit online video on Apr. 15, 2020. The slow train service, operated by Railway Chengdu Group Co., Ltd. in the 1970s to help villagers in poor regions commute, has become a lifeline for their economic development and helped lift people there out of poverty.