Chu Thuan Thuy (Chu Shun Shui) was a talented Chinese living in the early XVII century. He came to Vietnam 5 times in 12 years but still not be used by the imperial court. He went to Japan and help the country develop. It is a regret of many Vietnamese scholars after the study of Chu Shun Shui. However, he also left Vietnam some valuable historical material in the XVII century. This book is a unique historical document in many respects. This memoir gives the reader a picture of the situation in South Vietnam in the XVII century with some new features. For example, the language, the Chinese and Japanese communities in Hoi An, the scholarly situation, the bibliography of Han scripts in Cochin china at that time, the status of divination, the tendency to favor nominal titles.