North Korea on Monday added a key title to the credentials of its untested new ruler Kim Jong-Un, who met his first South Korean delegation since he was hailed as “great successor” to his late father. In a move that experts said shows the successor is on track to take full control of the secretive nation, the ruling party newspaper hailed Jong-Un as head of its Central Committee. “Let’s stake our lives to safeguard the party’s Central Committee led by dear comrade Kim Jong-Un,” Rodong Sinmun said. Jong-Un, in his late 20s, has also been touted as “supreme commander” of the military since his father Kim Jong-Il died on December 17 of a heart attack at the age of 69.