MF 849 then DL 5595 at JFK
Fuzhou → New York → Washington
Timetable, New York time
10:55MF 849 from Fuzhou at the gate
10:25DL 5595 to Washington leaves the gate
23 h 30 apart on the timetable, overnight
DL 5595 leaves 23 h 30 after MF 849 arrives on the timetable: more than half a day, so not a connection we count.