This book analyzes the challenges facing the United States coming from China's recent development in economic and political-security terms; and discuss the assessment, the view, the implementation in practice some American policy before the new strategy of China. Thereby make some comments and suggestions for Vietnam policy. The book consists of four chapters: Chapter 1: US-China Relations in recent years. Chapter 2: Adjusting China's Strategies and Challenges to the US. Chapter 3: The US Response to China's Strategic Adjustments. Chapter 4: Trends in the US-China Relations and Its Impact on Vietnam.