9C 6726 then ZH 9875 at Guangzhou
Ningbo → Guangzhou → Nanjing
Timetable, Guangzhou time
22:159C 6726 from Ningbo at the gate
19:05ZH 9875 to Nanjing leaves the gate
20 h 50 apart on the timetable, overnight
ZH 9875 leaves 20 h 50 after 9C 6726 arrives on the timetable: more than half a day, so not a connection we count.