If I was any member of the Chinese communist leadership, I would be very worried about North Korea displaying belligerent behaviour especially with their nuclear detonations, testing long range missiles, kidnapping of foreigners, and arresting persons, trying to help North Koreans with aid, as spies.  It is time for China to train its' pup to be housebroken.  Trump will be a little less tolerant than previous U.S. leaders.