It is important to be reminded that US-Taiwan relations is built on the foundation of an American law – the Taiwan Relations Act of 1979 (TRA). This is a unique law as it defines the United States’ multifaceted commitment to Taiwan. TRA has remained the bedrock of US-Taiwan relations that has underpinned Taiwan’s security and stability despite its increasing formal diplomatic isolation in the global stage. TRA, I argue, does not only define US-Taiwan relations, but equally important, has also outlined the nature of US-China relations and cross Straits relations. So, despite the public perception of the seeming ups and downs of US-Taiwan relations in the past 40 years, the reality is the US-Taiwan relations is stable and strong.