THE PRICE S KOREA HAS TO PAY TO CHINA TO ALLOW FOR THE UMBRILLA THAAD TO BE DEPLOYED IN THE PENNINSULA FOR THE PROTECTION OF ITS CITIZENS SO IT SEEMS TO ASSUAGE THE CHINA BY JOINING THE CHINESE OWNED AIIB S KOREA CAN NOW FORCE THE DONE DEAL NEGOTIATION FOR THE THAAD

Any deployment of the advanced U.S. missile defense system is going back to the negotiating table following South Korea's decision to join the China-led regional bank, Thursday, amid growing tension between Washington and Beijing over hegemony in Asia.
Seoul has faced a dilemma over whether to accept Washington's calls to deploy the Terminal High-Altitude Area Defense (THAAD) on Korean soil in order to deter a North Korean military attack.
China is against such a move, claiming the ballistic missile defense system is targeting its territory as part of U.S. efforts to enhance its leverage in the region.
Speculation is now growing that South Korea may be able to capitalize on its decision to join the Beijing-led Asian Infrastructure Investment Bank (AIIB) in order to bargain with both China and the U.S. over THAAD.
"I'd say the government is seeking a barter deal with the two superpowers, joining the AIIB in return for THAAD deployment," said Park Byung-kwang, a research fellow at the Institute for National Security Strategy (INSS).
He cited that the U.S. has been against its allies joining the AIIB. Washington has expressed concerns about whether the new investment bank would meet the standards of the World Bank and other regional banks in terms of governance, lending standards and procurement rules. South Korea will be one of the AIIIB founding members along with the United Kingdom, France, Germany and Italy.
"South Korea is sandwiched between the U.S. and China over THAAD. It seems that the Seoul-Washington discussions over the disputed missile interceptors will officially take place in the near future."

http://www.koreatimes.co.kr/www/news/nation/2015/03/120_176062.html