China will take unspecified measures to oppose the United States' proposed National Missile Defense (NMD) but will not engage in any form of arms race, Beijing's leading arms control negotiator said Thursday. 'If NMD is established, China will not sit on its hands and do nothing while watching its security breached,' Sha Zukang, the director of the foreign ministry?s department of disarmament said. But 'if established, China will not have a race with anyone, we have no capability to race with anyone,' he said.