CA 1696 then CA 1317 at Beijing
Daqing Shi → Beijing → Changsha
Timetable, Beijing time
19:15CA 1696 from Daqing Shi at the gate
18:30CA 1317 to Changsha leaves the gate
23 h 15 apart on the timetable, overnight
CA 1317 leaves 23 h 15 after CA 1696 arrives on the timetable: more than half a day, so not a connection we count.