This week in travel: a secret garden is a secret no longer in Beijing, one of France’s classic pastries is the subject of a surprising debate, and why some couples are ditching each other at the airport. Divide and conquer He likes arriving four hours early for a domestic flight and then chilling in the lounge. She prefers to have a pre-flight cocktail and browse the duty free options. What’s a couple to do? Welcome to “ the airport divorce .” British travel journalist Huw Oliver coined the