The US is not attending talks between North and South Korea but its reactions will be as critical and closely watched as those who gather at the tense border for the first time in two years on Tuesday.

North Korea said during rare talks with the South on Tuesday it will send a delegation of high-ranking officials, athletes and a cheering squad to the Pyeongchang Winter Olympics in South Korea next month, according to a senior South Korean official.

North Korea has agreed to hold high-level talks with South Korea next week as detente between the two nations picks up pace. The talks — the first inter-K

President Trump again raised the prospect of nuclear war with North Korea, boasting in strikingly playground terms on Tuesday night that he commands a “much bigger” and “more powerful” arsenal of devastating weapons than the outlier government in Asia.

China said on Thursday there had been no U.N. sanction-breaking oil sales by Chinese ships to North Korea, after a South Korea newspaper said Chinese and North Korean vessels had been illicitly linking up at sea to get oil to North Korea.

The U.S. National Security Strategy released on December 18 is extremely critical of China but does not invariably portend a more confrontational policy. Sino-American relations are very much in flux. In the coming year, Beijing and Washington can take actions to redirect the relationship towards a more positive trajectory.

China’s proposal of a “freeze for freeze”—a halt in North Korean nuclear and missile tests in return for suspension of provocative U.S.-led military exercises—remains the best one on the table for reducing tensions on the Korean peninsula. Second, keeping nuclear weapons from getting into the wrong hands should be an international responsibility, not a U.S.-China project.

North Korea announced that it has mastered nuclear strike capability and become a full-fledged nuclear state. Like previous US presidents, Donald Trump has said that this state of affairs is intolerable. So now what?

The Korean nuclear issue has now entered a dangerous stage like a fast train in a dark tunnel. The window for peaceful settlement isn’t completely closed and the current crisis should be turned to an opportunity.