CZ 6341 then CZ 3639 at Guangzhou
Changchun → Guangzhou → Nantong
Timetable, Guangzhou time
15:00CZ 6341 from Changchun at the gate
13:35CZ 3639 to Nantong leaves the gate
22 h 35 apart on the timetable, overnight
CZ 3639 leaves 22 h 35 after CZ 6341 arrives on the timetable: more than half a day, so not a connection we count.