It's a pretty safe bet. It'd be a suicide mission for a company as high profile as Apple or Foxconn to set up any kind of substantial manufacturing facility outside of a right to work state.
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Americans have worked various shifts at manufacturing and distribution facilities for as long as these businesses have been in operation. Most of these kinds of facilities are open 24/7, it's nothing new. People get hired for a particular shift and work those hours.
Really, I'm explaining the concept of shift work to someone? What are you 12 years old?