Diaoyu Dao, an Inherent Territory of China

2. Diaoyu Dao had long been under China's jurisdiction

In the early years of the Ming Dynasty, China placed Diaoyu Dao under its coastal defense to guard against the invasion of Japanese pirates along its southeast coast. In 1561 (the 40th year of the reign of Emperor Jiajing of the Ming Dynasty), An Illustrated Compendium on Maritime Security (Chou Hai Tu Bian) compiled by Zheng Ruozeng under the auspices of Hu Zongxian, the supreme commander of the southeast coastal defense of the Ming court, included the Diaoyu Dao Islands on the "Map of Coastal Mountains and Sands" (Yan Hai Shan Sha Tu) and incorporated them into the jurisdiction of the coastal defense of the Ming court. The Complete Map of Unified Maritime Territory for Coastal Defense (Qian Kun Yi Tong Hai Fang Quan Tu), drawn up by Xu Bida and others in 1605 (the 33rd year of the reign of Emperor Wanli of the Ming Dynasty) and the Treatise on Military Preparations. Coastal Defense II. Map of Fujian's Coastal Mountains and Sands (Wu Bei Zhi. Hai Fang Er. Fu Jian Yan Hai Shan Sha Tu), drawn up by Mao Yuanyi in 1621 (the first year of the reign of Emperor Tianqi of the Ming Dynasty), also included the Diaoyu Dao Islands as part of China's maritime territory.

The Qing court not only incorporated the Diaoyu Dao Islands into the scope of China's coastal defense as the Ming court did, but also clearly placed the islands under the jurisdiction of the local government of Taiwan. Official documents of the Qing court, such as A Tour of Duty in the Taiwan Strait (Tai Hai Shi Cha Lu) and Annals of Taiwan Prefecture (Tai Wan Fu Zhi) all gave detailed accounts concerning China's administration over Diaoyu Dao. Volume 86 of Recompiled General Annals of Fujian (Chong Zuan Fu Jian Tong Zhi), a book compiled by Chen Shouqi and others in 1871 (the tenth year of the reign of Emperor Tongzhi of the Qing Dynasty), included Diaoyu Dao as a strategic location for coastal defense and placed the islands under the jurisdiction of Gamalan, Taiwan (known as Yilan County today).

3. Chinese and foreign maps show that Diaoyu Dao belongs to China

The Roadmap to Ryukyu (Liu Qiu Guo Hai Tu) in the Shi Liu Qiu Lu written by imperial title-conferring envoy Xiao Chongye in 1579 (the seventh year of the reign of Emperor Wanli of the Ming Dynasty), the Record of the Interpreters of August Ming (Huang Ming Xiang Xu Lu) written by Mao Ruizheng in 1629 (the second year of the reign of Emperor Chongzhen of the Ming Dynasty), the Great Universal Geographic Map (Kun Yu Quan Tu) created in 1767 (the 32nd year of the reign of Emperor Qianlong of the Qing Dynasty), and the Atlas of the Great Qing Dynasty (Huang Chao Zhong Wai Yi Tong Yu Tu) published in 1863 (the second year of the reign of Emperor Tongzhi of the Qing Dynasty) all marked Diaoyu Dao as China's territory.

The book Illustrated Outline of the Three Countries written by Hayashi Shihei in 1785 was the earliest Japanese literature to mention Diaoyu Dao. The Map of the Three Provinces and 36 Islands of Ryukyu in the book put Diaoyu Dao as being apart from the 36 islands of Ryukyu and colored it the same as the mainland of China, indicating that Diaoyu Dao was part of China's territory.

The Map of East China Sea Littoral States created by the French cartographer Pierre Lapie and others in 1809 colored Diaoyu Dao, Huangwei Yu, Chiwei Yu and the Taiwan Island as the same. Maps such as A New Map of China from the Latest Authorities published in Britain in 1811, Colton's China published in the United States in 1859, and A Map of China's East Coast: Hongkong to Gulf of Liao-Tung compiled by the British Navy in 1877 all marked Diaoyu Dao as part of China's territory.