Amidst the rapidly evolving international maritime situation,a policy debate has been brewing among US decision-makers over the longdelayed issue of ratifying the United Nations Convention on the Law of the Sea (UNCLOS).While the US can rest assured knowing that it is the dominant sea power,it is still mulling the pros and cons of ratifying the Convention.Yet the prospect of the US formally joining UNCLOS looms large in the long run,and that will have adverse effects on Chinas maritime security rights and interests.