North Korea, China Vow Greater Cooperation, Pyongyang Says 

SEOUL - The leaders of North Korea and China traded messages vowing to strengthen cooperation on the anniversary of their treaty of friendship, cooperation and mutual assistance between the two countries, North Korea's KCNA news agency reported Sunday.

In a message to China's Xi Jinping, North Korean leader Kim Jong Un said their relationship was vital in the face of hostile foreign forces, while Xi promised to bring cooperation "to a new stage," KCNA said. China has been North Korea's only major ally since the two signed the treaty in 1961, and international sanctions imposed over Pyongyang's nuclear weapons and ballistic missile programs have made it more dependent than ever on Beijing for trade and other support. "Despite the unprecedentedly complicated international situation in recent years the comradely trust and militant friendship between the DPRK and China get stronger day by day," KCNA quoted Kim as saying in his message. DPRK stands for North Korea's official name, the Democratic People's Republic of Korea.