North Korean leader Kim Jong Un and Chinese President Xi Jinping on Sunday exchanged messages of greeting on the occasion of the 60th anniversary of a treaty of friendship, cooperation and mutual assistance, according to state-run media.The move comes as Pyongyang and Beijing have pledged to bolster their ties, with their respective relations with the United States showing few signs of improving anytime soon since President Joe Biden took office in January.The two leaders agreed to deepen ties between the two countries, with Kim saying North Korea's friendship with China was "forged at the …READ FULL ARTICLE