Who would Work at Night?

The whole concept of people in China being awake when we are 
asleep and vise versa is something that both Olivia and Evan 
understood from a very young age.  We would always talk about 
the sun setting on our horizon and going to see 外公(grandfather 
on mother’s side) and 外婆 (grandmother on mother’s side).
 
Recently Daddy was driving with Olivia to the local convenience 
store "Wawa” to pick up some milk and she asked when Wawa would 
be closed.  Daddy told her that they never close, they're open 
24 hours a day so that people who work at night can go there in 
case they need anything.  
 
"Do you know that there are people who actually sleep during 
the day and then work at night?” Daddy was trying to make a 
point to let her know that not everyone works during the day 
and sleeps at night like most of us do.
 
"That's like people in China!" she replied, not missing a beat.