SEOUL -- The text message, sent at 4:30 a.m., starts with an apology.
"Sorry, I know you're sleeping," a 36-year-old delivery driver for Hanjin Express surnamed Kim wrote to a colleague after a day during which he delivered 420 packages. By the time he got home, he said, he would have no time to sleep, he would eat and shower, then head back to the terminal for another long day.
