China's Xi lands in North Korea for rare visit, hails 'invincible friendship' with Pyongyang

China’s President Xi Jinping hailed an “invincible friendship” with Pyongyang as he arrived in North Korea on Monday, his first trip abroad this year after hosting back-to-back summits in Beijing. China, Washington’s chief geopolitical rival, has been North Korea’s main trading partner by far for decades and a key source of diplomatic and economic support for the country hit by multiple international sanctions. Military officers lined a red carpet as an Air China plane carrying Xi arrived for hi...