VN 310 then IJ 253 at Narita
Hanoi → Tokyo → Tianjin
Timetable, Tokyo time
12:45VN 310 from Hanoi at the gate
11:00IJ 253 to Tianjin leaves the gate
22 h 15 apart on the timetable, overnight
IJ 253 leaves 22 h 15 after VN 310 arrives on the timetable: more than half a day, so not a connection we count.