This book is devoted to quantify the role of the world''s major economies in the international division from the perspective of global value chains and clarify the value cycle system between China and developed and developing economies. This book establishes a theoretical paradigm that conforms to the current world economic structure. That is, the world economic structure gradually shifts from a single-cycle model centered on developed countries to a more complex dual-circulation model. Furthermore, based on the analysis of the current world economic situation, it also analyzes the interaction between trade and investment and the synergistic effect of the Corridors under the Belt and Road Initiative. The first part of the book brings a better understanding of mutual relationships between trade and investment under the Belt and Road Initiative and broadens the research fields of relevant studies. Additionally, comprehensive and specific country research is particularly conducted in this book. By analyzing the economic indicators, reviewing social history and social-economic development, covering various countries along the Belt and Road, it provides deep exploration of the fields and approaches of the most potential cooperation under the purpose of "Peace, Development, Cooperation and Win-Win." Therefore, this part draws a broad map of economic and cultures in order to provide a reference and assistance for promoting the Belt and Road Initiative. Fulfilling this vision, this book hopes to deepen the understanding of economic development of each relevant economy to encourage the participation of economies in regional connectivity.