http://www.scmp.com/comment/insight-opinion/article/2139238/real-reasons-behind-xi-jinpings-meeting-north-korean-leader
Me think that President Xi is readying NK for retaliation over Trump's move on Taiwan.
http://www.scmp.com/news/china/diplomacy-defence/article/2138500/second-senior-us-official-sent-taiwan-under-new-travel