One thing to look at is BA27/28 & BA 31/32 (HKG-LHR) and CX flights which seem to be" threading the needle" once leaving China airspace.
BA28 (BAW28) British Airways Flight Tracking and History 23-Jan-2024 (HKG / VHHH-LHR / EGLL) - FlightAware
Track British Airways (BA) #28 flight from Hong Kong Int'l to London Heathrow
www.flightaware.com
CX251 (CPA251) Cathay Pacific Flight Tracking and History 19-Jan-2024 (HKG / VHHH-LHR / EGLL) - FlightAware
Track Cathay Pacific (CX) #251 flight from Hong Kong Int'l to London Heathrow
www.flightaware.com