South Korea's participation in a NATO-like multilateral military alliance in the Indo-Pacific could destabilize the region because Beijing will see Seoul as an enemy. That's what a special advisor to the South Korean President said on Tuesday. Moon Chung-in insisted Washington's drive to form a regional coalition against China may prompt a counter-reaction, with Beijing forming an alliance with Russia and North Korea. He also said a formal declaration to end the Korean War is the route to complete denuclearization. Currently, the U.S. is involved in a four-way dialogue known as "the Quad" along with Australia, India and Japan. The U.S. is seeking to form a multilateral structure it says will counter aggression from the Chinese Communist Party in all domains.