CZ 678 then ZH 9869 at Guangzhou
Luxembourg → Guangzhou → Nanjing
Timetable, Guangzhou time
14:55CZ 678 from Luxembourg at the gate
13:40ZH 9869 to Nanjing leaves the gate
22 h 45 apart on the timetable, overnight
ZH 9869 leaves 22 h 45 after CZ 678 arrives on the timetable: more than half a day, so not a connection we count.