9C 6726 then CZ 6589 at Guangzhou
Ningbo → Guangzhou → Enshi
Timetable, Guangzhou time
22:159C 6726 from Ningbo at the gate
19:30CZ 6589 to Enshi leaves the gate
21 h 15 apart on the timetable, overnight
CZ 6589 leaves 21 h 15 after 9C 6726 arrives on the timetable: more than half a day, so not a connection we count.