It looks like this how the ROK government has decided to show its citizens that is doing something about the amount of crime committed by Chinese tourists on Jeju island:
According to the Beijing News and other local Chinese newspapers on Sunday, over 100 Chinese tourists were refused entrance to Jeju Island by Korean immigration authorities over China’s week-long national holiday last week, and the tourists were reportedly detained at the Jeju International Airport for hours, some even days, before returning to China.
“A number of tourists were refused entry for various reasons, and detained [at the airport],” the Beijing News reported on Sunday. “The room contained simple facilities, like electric outlets, and had no bed or blankets.”
The Chinese paper reported that a Chinese citizen surnamed Zhang and his wife were detained at the airport because they could not provide papers for their accommodation reservations at the island.
The paper added that over 100 Chinese tourists were detained at Jeju International Airport during the national holidays, staying at most five days. [Joong Ang Ilbo]
You can read more at the link.