Trump-Kim Summit Cancels after Kim's visit to China

  When the world watches North Korea's movements recently, a shocking news arrived yesterday that the long-anticipated summit between leaders of USA and NK is going to be cancelled.

  When most of us believe that NK will gradually democratize, especially after the recent meeting of Moon Jae-In and Kim, this sudden 180 degree change makes us perplexed.
Leaders of both Korea enjoyed a peaceful time, and Kim seemed quite willing to talk with Trump.
So, what is the very reason that made him change so resolutely?

  One of the most persuading answer is: China.
After Kim and Trump seemingly promised to hold a summit, Kim visited China and met its current leader Xi Jin-Pin twice.
His attitude altered especially after the 2nd visit.
As most of us know quite well, China, its Communist Party has a strong will to dominate over world politics and economy (while internal Human Rights is still a persistent problem).
Communist "Red" China is one of the biggest threat against world peace and harmony at current time.