ZH 8904 then ZH 8941 at Guangzhou
Zhengzhou → Guangzhou → Yinchuan
Timetable, Guangzhou time
12:20ZH 8904 from Zhengzhou at the gate
09:50ZH 8941 to Yinchuan leaves the gate
21 h 30 apart on the timetable, overnight
ZH 8941 leaves 21 h 30 after ZH 8904 arrives on the timetable: more than half a day, so not a connection we count.