DPRK has a unique in the world political system. This hybrid of east-asian despotism inspired neoconfucianism is connected with the Stalinist version of communism. North Korean political system created by Kim Il Sung is still living. Celebrations of 100th birth of Kim Il Sung made function for stability of regime. Domestically it to the society of North Korea shows North Korea Society that Great leader is strong and able confront the US and South Korea. Also show the succession is successful and successor is able to continue of work Grandfather and Father.
Current hostility in North-south relations has brought both countries at the verge of war. One hand North Korea will peaceful environment for Celebrations time, second hand her policy not change China plays a vital role on the on the Korean Peninsula and its policy is driven strictly own national interests. On one side China is strongly interested in the economic development of DPRK. One side China is strongly interested in the economic development of DPRK in order to make this country more economically self-reliant and less dependent on Chinese aid. On the other side china will never accept unified, pro-American and anticommunist Korea.
The main goal of the DPRK is survive within the fast changing world. For achievement this goal use lot measures like: diplomacy, terror, artillery strike, torpedoing.