China said on Friday tension over North Korea had to be stopped from reaching an "irreversible and unmanageable stage" as a U.S. aircraft carrier group steamed toward the region amid fears the North may conduct a sixth nuclear weapons test. Concern has grown since the U.S. Navy fired 59 Tomahawk missiles at a Syrian airfield last week in response to a deadly gas attack, raising questions about U.S. President Donald Trump's plans for North Korea, which has conducted missile and nuclear tests in defiance of U.N. and unilateral sanctions. The United States has warned that a policy of "strategic patience" is over. U.S. Vice President Mike Pence travels to South Korea on Sunday on a long-planned 10-day trip to Asia. China, North Korea's sole major ally and neighbor which nevertheless opposes its weapons program, has called for talks leading to the denuclearisation of the Korean peninsula. "We call on all parties to refrain from provoking and threatening each other, whether in words or actions, and not let the situation get to an irreversible and unmanageable stage," Chinese Foreign Minister Wang Yi told reporters in Beijing. Read more http://www.reuters.com/article/us-northkorea-event-idUSKBN17E2CT