CZ 3958 then BK 2787 at Guangzhou
Yangzhou → Guangzhou → Tianjin
Timetable, Guangzhou time
09:55CZ 3958 from Yangzhou at the gate
06:55BK 2787 to Tianjin leaves the gate
21 h apart on the timetable, overnight
BK 2787 leaves 21 h after CZ 3958 arrives on the timetable: more than half a day, so not a connection we count.