CA 1696 then CA 1337 at Beijing
Daqing Shi → Beijing → Shenzhen
Timetable, Beijing time
19:15CA 1696 from Daqing Shi at the gate
16:00CA 1337 to Shenzhen leaves the gate
20 h 45 apart on the timetable, overnight
CA 1337 leaves 20 h 45 after CA 1696 arrives on the timetable: more than half a day, so not a connection we count.