The U.S. and China are the world’s two major countries undergoing rapid changes. If you follow the media, you will find that the U.S.-China relation has swung from worse to better, and better to worse in the past few years while each has been changing politically and economically. The recent change for the worse in the U.S.-China relations is worrisome for the entire world. The already complex relationship between the two giants is further compounded by the fierce 2016 U.S. Presidential election resulting in a new administration which prefers to play Trump cards in a no-trump game (bridge jargon). The new U.S. Administration seems to disregard old game rules, conventional suits and existing contracts, thus creating great uncertainty in its China policy which is troubling and challenging China, and bewildering the U.S. allies. China, on the other hand, is gearing up more efforts to inject itself into global affairs while trying to maintain its healthy economic growth and keeping the U.S. at arm’s length. Whether the two giants will change for better or worse is the author’s quest for answer in his writings. The Changing Giants - The U.S. and China is Dr. Chang's third book following Understanding the U.S. and China (2015) and U.S.-China Relations (2014) to track the development of the U.S. and China, as well as monitor their changing relationship. In this book, Dr. Chang closely examines the current events happening between the two nations and interprets their consequences in the light of the unique historical background of each nation. Through the pages of this book, the author hopes that better understanding of the past can lead people to influence the future. The author hopes that the two changing giants will develop a collaborative relationship for the sake of world peace and prosperity.