CZ 3605 then ZH 9873 at Guangzhou
Yanji → Guangzhou → Nanjing
Timetable, Guangzhou time
18:55CZ 3605 from Yanji at the gate
17:00ZH 9873 to Nanjing leaves the gate
22 h 05 apart on the timetable, overnight
ZH 9873 leaves 22 h 05 after CZ 3605 arrives on the timetable: more than half a day, so not a connection we count.