According to the regulations of China Passenger Dedicated Line Company, smoking is prohibited on the K-prefix train, because smoking in the carriage will pose a threat to the health of other passengers.
K702 is a train from Qingdao North to Shaerbin West, with a mileage of 2004km and a duration of 26 hours and 37 minutes. The main shore section of Harbin Bureau serves as a crew member.