9C 8680 then CZ 3905 at Guangzhou
Shijiazhuang → Guangzhou → Harbin
Timetable, Guangzhou time
20:559C 8680 from Shijiazhuang at the gate
19:30CZ 3905 to Harbin leaves the gate
22 h 35 apart on the timetable, overnight
CZ 3905 leaves 22 h 35 after 9C 8680 arrives on the timetable: more than half a day, so not a connection we count.