According to the pattern of previous years, once the initial golden period has passed, the Civilian Department's purchase price will drop from '10 yuan each' to '5 yuan each,' and they'll only accept them alive.
Because after the first wave of sweeps, the number of startled cicadas in the city has decreased significantly, the number of citizens complaining has plummeted, and the Civilian Department's control of cicada numbers is no longer as urgent.
However, once the purchase price drops, it'd only be more worthwhile for college students to pay for round-trip transportation to the slightly more distant suburbs for intensive hunting.
And yet...
Apart from the cost of transportation, they also have to bear the loss of 'startled cicadas' dying halfway through the trip - buying the live ones at 5 yuan each and the dead ones at 0.5 yuan each.