“...After many years of waiting, facing challenges, and passing through arduous experiences, I have come to the realization that: My research project involves a complex combination of disciplines and social knowledge, and requires a lengthy and complex process of vindication, so as to “turn nothing into something”. Only highly patient and devoted readers will be able to follow all the stages of this research with understanding. If this project later obtains official recognition, the majority of readers will benefit only from the final results—there is little hope that many people will take the time to go back through all the stages of discovery and thus come to understand the harsh journey I have undergone. I have composed this retrospective account of my research as I enter my early 80s. This book can thus be considered my last book on the Đan Duong Palace research project. Therefore, in addition to the main section on the research, I have included a section containing photos of original documents, including references, opinions, and debates concerning the research, and writings on the tomb of Emperor Quang Trung that have become available before, during, and after the completion of my work on the research project, Đan Duong Palace – The Tomb of Emperor Quang Trung. In addition to describing the research itself, I have also recorded interviews in which I replied to queries and concerns related to the project. In this book, I also address issues I have thought of but have been unable to implement – issues that are beyond my capacity, due to my limitations as a historical researcher not belonging to any state -sponsored organization devoted to social and scientific study.

1. Historical sites. 2. Duong Xuan residence. 3. Nguyen Dynasty. 4. Vietnam.