Originally Posted by
jiejie
In this case for pollution of the stroll in the park photo, caption is correct. For the little girls' photo, probably for illness but could be for pollution, not enough context to tell. However, while I sometimes see Chinese adults with colds wear masks to keep from spreading germs (a la Japanese custom), I uncommonly see them put masks on sick kids.
I believe the little girl isn't wearing the mask for pollution.
Appears as though she is in somekind of event.