This book is a rarity in that it analyzes comprehensive updates of East Asian economies beyond COVID-19 with quantitative and scientific methods. COVID-19 has brought in structural changes such as the facilitation of digitalization and the slowdown of globalization in the region’s economies. Meanwhile, those economies have adjusted their structures to the changes and have enhanced their resilience against the shocks beyond COVID-19 in order to sustain their economic growth. These adjustments have accompanied the transformations of industries (such as servicification), global value chains, and trade and investment patterns. Policy momentums have also been affected by the structural changes caused by COVID-19 in areas such as poverty alleviation, environment, and foreign aid. So far, however, there have been only a very limited number of quantitative studies to describe the economic transformations toward the post-COVID-19 era among the vast literature of East Asian studies. This book applies scientific approaches such as data-oriented and econometric methods. In this manner, the book enriches empirical evidence in academic literature and also contributes to evidence-based policymaking. This study is also based on the research collaboration with Mae Fah Luang University in Thailand, which specializes in border economies in the Greater Mekong Subregion. Thus, the study’s outcomes will especially interest academic researchers and policymakers.