CA 1204 then 8L 9988 at Beijing
Xining → Beijing → Kunming
Timetable, Beijing time
20:40CA 1204 from Xining at the gate
20:158L 9988 to Kunming leaves the gate
23 h 35 apart on the timetable, overnight
8L 9988 leaves 23 h 35 after CA 1204 arrives on the timetable: more than half a day, so not a connection we count.