Originally Posted by
LHR/MEL/Europe FF
you will need to change your outbound flight, or buy a separate ticket (and use it) to a third country.
You could buy a cheap round-trip ticket to Hong Kong, Tokyo or Seoul for example to sandwich in the middle of your stay. This would give you two TWOV in China.
The alternative is that you will be denied boarding in Europe.
I don't have time in the 76 hours to sandwich a ticket in. How do they check your flights, just by a print out and the time that you came back in the airport?