9C 8680 then CZ 3507 at Guangzhou
Shijiazhuang → Guangzhou → Nanjing
Timetable, Guangzhou time
20:559C 8680 from Shijiazhuang at the gate
19:10CZ 3507 to Nanjing leaves the gate
22 h 15 apart on the timetable, overnight
CZ 3507 leaves 22 h 15 after 9C 8680 arrives on the timetable: more than half a day, so not a connection we count.