Pham Hoang Quan is an independent researcher, with a special approach: to study from the ancient Chinese chronicle to prove Vietnam's sovereignty in history. He started researching the South China Sea and the Paracel and Spratly Islands since 2005 and was awarded the Phan Chau Trinh Culture Prize in 2015. The book has a wide range and interesting topics such as: Study of Kinh ethnicity in Guangxi, China; Translation of Vietnamese history in the flat world; Fish sauce in historical documents; Sea culture shown through ancient boat; Vietnamese artifacts in ancient historical documents; China - Vietnam trade relations in the early years of the Nguyen dynasty; Nine-dash lines and conspiracies of Chinese scholars; History of Vietnam - Japan relations in the 16th - 17th century...