ZH 887 then BA 512 at Heathrow
Shenzhen → London → Lisbon
Timetable, London time
20:30ZH 887 from Shenzhen at the gate
19:05BA 512 to Lisbon leaves the gate
22 h 35 apart on the timetable, overnight
BA 512 leaves 22 h 35 after ZH 887 arrives on the timetable: more than half a day, so not a connection we count.