The Democratic People\'s Republic of Korea (DPRK) threatened on Saturday to shut down a joint industrial park with South Korea if it continued to insult DPRK\'s dignity, the official KCNA news agency reported.The industrial park, located in the DPRK border city of Kaesong, was launched in 2004 to house around 120 South Korean companies that employ some 50,000 DPRK workers.