Originally in Chinese, published in Taiwan in 1996, is a review on the Sino-French dispute in the late 19th and early 20th centuries, closely related to the history of Vietnam under the Nguyen Dynasty. Long Chuong's research is a major scholarly work, focusing on China's intervention when the French launched the war to colonize Indochina. The details presented are almost unknown to most of us, or if so, only vaguely. It is a pity that in a period of hot oil and fire, the fate of Vietnam is not decided in Hanoi, Hue or Saigon but in faraway places such as Paris, Beijing, Tianjin, or Shanghai. Diplomatic disputes and commercial concessions led to the decision that many border areas should be kept for our country or belonged to China's territory. Those negotiations did not understand whether the Hue court knew about it or not, but have not seen it mentioned in the national history.