More smoke got blown this week. South Korea's president is stepping-up efforts to talk to China about North Korea. Asian culture dictates that a country as big as China doesn't give a rat's synthetic tail about what a small country like South Korea thinks. All South Korea can expect is to be in China's debt merely for listening since the diplomacy won't affect outcomes whatsoever. China probably knows this. Whatever "deal" does or does not follow Moon's efforts with the Chinese will be an indication of China's greater intentions for the future. Don't expect too many fireworks; it's mostly politicians blowing smoke.
Things in Korea are stepping up, however. More sanctions are coming down. Secretary of State Tillerson commented about possible naval blockades, which sent a threat of "declared war" bouncing back from the North Koreans—more blown smoke from all sides. As for South Korea and Japan cooperating with the US—they will be "watching" missiles from North Korea. Usually, missiles have little to watch other than a trail of—well, a trail of smoke.
The big note to take about Moon is that his obsession with "talking" and "reconciliation" could prove very valuable after other players (the US, the UN, possibly China and others) do their parts to initiate reunification on the Korean Peninsula. When Korea becomes one country again, it might benefit from a leader like Moon who hungers for an opportunity to get opposite sides talking. But, we'll see.
China's state-run tabloid commented that a visit from the US Navy to a Taiwanese Naval port would activate a kind of "Anti-Secession" law in China and China's PLA would invade Taiwan and immediately reclaim the territory. The statement came months after US Congress approved and planned such port visits between Taiwan and the US for 2018. Taiwan is responding by constricting and banning select visits from Chinese diplomats, usually surrounding topics of "Human Rights" and warlike rhetoric. Again, all sides blowing more smoke without a shot fired, yet.
Usually, boiler cars bellow more smoke, blow their whistles, and let off steam as buildup to a conflict mounts—or just before a train wreck. The smoke is not without meaning, but as of this week, smoke blown remains little more than blown smoke and neither the topics nor the players have changed.
In fact, every small development reported by news outlets seems to follow the format of new facts in the first few paragraphs followed by the same, long background story, whether the background is about a conflict between North and South Korea or between Taiwan and China. That's what you call a clue: The press seems to feel that the public will need that background for the avalanche of news to come.