I asked the delivery guy, "Do you get tired running so many orders every day?" He said, "Tired. But I’ve noticed a pattern — the more urgent they are, the less likely they are to tip; the ones who say 'Take your time' are more likely to give a tip." I asked, "So which do you prefer to take?" He smiled and said, "Of course, the ones that aren't urgent. Because the words 'Take your time' are worth five yuan."