On a bustling afternoon along #Shanghai's Nanjing Road pedestrian street, often dubbed the "No 1 Commercial Street in China", many foreigners are practicing a new travel trend popular on social media: arriving in China with an empty suitcase, intending to leave with it full.

On a bustling afternoon along #Shanghai's Nanjing Road pedestrian street, often dubbed the "No 1 Commercial Street in China", many foreigners are practicing a new travel trend popular on social media: arriving in China with an empty suitcase, intending to leave with it full.