From Lanzhou to Qingmuchuan, you can choose to take the train from Lanzhou to Chengdu. Among them, the most suitable one may be the K966 train from Lanzhou to Chengdu. This is a fast train with a relatively short running time and is suitable for long-distance travel. However, the specific train choice depends on your travel time, budget and personal preferences. It is recommended that you check the latest train time and fare information before purchasing tickets.