Fearmongering by USA again.

https://au.news.yahoo.com/world/a/35539728/north-korea-poses-threat-to-china-russia-us-admiral/#page1

If North Korea is really a threat to China and Russia, they won't just sit by without taking further action.  China and Russia have very good radars to defend themselves.  Therefore, there is no need for USA to remind China and Russia that NK is a threat to them.