The warning came from Kim Jong-un, the North Korean ruler who sees his isolated nation, just across the border from this busy Chinese trading town, as under siege. The attack, he said, must be stopped.
"We must extend the fight against the enemy's ideological and cultural infiltration," Kim said in an October speech at the headquarters of his immensely powerful internal security service. Kim, who became North Korea's supreme leader after the death of his father a year ago, called upon his vast security network to "ruthlessly crush those hostile elements."
Over the past year, Kim has intensified a border crackdown that has attempted to seal the once-porous 1420-kilometer frontier with China, smugglers and analysts say, trying to hold back the onslaught.
Kim Jong-un at a national parade. Photo: Reuters
The assault that he fears? It's being waged with cheap televisions rigged to receive foreign broadcasts, and with smuggled mobile phones that - with a Chinese signal along the border - can call the outside world. Very often, it arrives in the form of wildly popular South Korean soap operas smuggled in on DVDs or computer thumb drives.
In North Korea, a country where international phone calls and internet connections exist only for a tiny fraction of a tiny elite, and televisions and radios must be permanently preset to receive only state broadcasts, it's Korean-language TV heartache they crave.
"South Korean dramas, that's what everyone wants," grumbled a Seoul-based Christian missionary who runs a string of safe houses in this part of China, where his network helps people living underground after fleeing North Korea. One safe house is reserved for traders who sell everything from electronics to shoes inside North Korea - and who smuggle everything from Bibles to soap operas on the side. He spoke on condition of anonymity to protect the safety of his network.
There's "Autumn in My Heart," a 12-year-old tear-jerker replete with switched babies, forbidden love, and a comatose heroine. And "Stairway to Heaven," an epic of more forbidden love, more switched identities, blindness, insanity, a brain tumor and an evil stepmother. Everywhere in the soaps, there are tales of unrequited love, conniving rivals and handsome young men who just don't realize they'd find true love with the girl next door.
But if it looks absurd - a Stalinist nation vowing to crush an assault of bad lighting and overacting - the dilemma is deadly serious for Kim, who needs to find a way to modernise his country and its economy while holding onto absolute power.
Sign up for Computerworld eNewsletters.