The UN Security Council failed to agree on a US-drafted statement that condemns North Korea's latest ballistic missile launch on Tuesday, because China demanded the statement oppose any provocative moves that take advantage of North Korea's nuclear threat and missile project to enable a deployment of anti-missile systems in Northeast Asia.

China's proposition is aimed at the Terminal High Altitude Area Defense (THAAD) missile system that will be stationed by the US in South Korea. Since the US and South Korea announced the plan, the UN Security Council has failed twice to reach agreement over North Korean missile launches because of the major split between China and the US.

The planned deployment is adding a new challenge to the vulnerable geopolitical landscape of Northeast Asia. The international collaboration against North Korea's nuclear project has been crippled. A degenerative aura of the Cold War is emanating from the US-Japan-South Korea alliance.

China does not have a motive to encourage North Korea to develop nuclear weapons or ballistic missiles, because at the cost of its ties with the North, it has been a backer of the UN Security Council's sanctions against it. However, the US and South Korea went too far and made use of North Korea's nuclear threat to deploy THAAD, which will cause great harm to China's national security. Given China's cooperation in sanctioning North Korea, it is nothing but a stab in the back.

North Korea's nuclear ambition was primarily triggered by long-standing military pressures imposed by South Korea and the US. The escalating pressures have met bolder nuclear projects. China being a well-intentioned and responsible mediator has been paid back by a threatening advanced military system.

The US and South Korea are strongly convinced that they are absolutely right in this case, and any disagreement is totally wrong. The narrow-mindedness renders all proposals fruitless and futile.

The Korean Peninsula is intertwined with too many complications and concerns. The deployment of THAAD is a selfish and reckless move that will break the fragile balance with terrible outcomes: There will be a huge setback in the Sino-South Korean relationship; the susceptible Sino-US collaboration over Northeast Asia will collapse - all will result in a reconfiguration of each stakeholder's policy on the region.

Although unwilling to go to war, all players in the big game should reflect on their policies as growing tensions have turned them more defensive rather than open.

The major-power rivalry between China and the US is behind many disputes in East Asia. Beijing and Washington seem to have a tacit understanding that their rivalry won't explode into a physical conflict. However, some countries cannot look at the big picture, and are eager to pick sides, but they will only find that they are cannon fodder.

China and the US are exchanging blows over THAAD, but they won't get into a real fight. However, if South Korea leaps headlong into this round of games and becomes a US agent, it will put itself in the middle of a new crisis.

South Korea is a confused player in the big game. It might eventually find out that THAAD will not bring about what it really expects.