Photo released by the KCNA news agency on April 1 shows that a plenary meeting of the Central Committee of the Workers' Party of Democratic People's Republic of Korea (DPRK) is held in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA )

Photo released by the KCNA news agency on April 1 shows that Kim Jong-un, leader of Democratic People's Republic of Korea (DPRK), speaks during a plenary meeting of the Central Committee of the DPRK in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA)

Photo released by the KCNA news agency on April 1 shows that Kim Jong-un (Front), leader of Democratic People's Republic of Korea (DPRK), speaks during a plenary meeting of the Central Committee of the DPRK in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA)

Photo released by the KCNA news agency on April 1 shows that Kim Jong-un (Front C), leader of Democratic People's Republic of Korea (DPRK), attends a plenary meeting of the Central Committee of the DPRK in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA)

Photo released by the KCNA news agency on April 1 shows that Kim Jong-un (Front), leader of Democratic People's Republic of Korea (DPRK), attends a plenary meeting of the Central Committee of the DPRK in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA)

Photo released by the KCNA news agency on April 1 shows that Kim Jong-un (L), leader of Democratic People's Republic of Korea (DPRK), speaks during a plenary meeting of the Central Committee of the DPRK in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA)

Photo released by the KCNA news agency on April 1 shows that a plenary meeting of the Central Committee of the Workers' Party of Democratic People's Republic of Korea (DPRK) is held in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA)

Photo released by the KCNA news agency on April 1 shows that a plenary meeting of the Central Committee of the Workers' Party of Democratic People's Republic of Korea (DPRK) is held in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA)

Photo released by the KCNA news agency on April 1 shows that a plenary meeting of the Central Committee of the Workers' Party of Democratic People's Republic of Korea (DPRK) is held in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA)

Photo released by the KCNA news agency on April 1 shows that a plenary meeting of the Central Committee of the Workers' Party of Democratic People's Republic of Korea (DPRK) is held in Pyongyang, capital of the DPRK, on March 31, 2013. (Xinhua/KCNA) (zf)