The Story of the Sea has more than 6200 words. Among them, the page "Introduction to the Enclaved Ryukyu Kingdom" records "Worship Heishuigou from afar, and then worship Tianhou Palace. Suddenly I saw Bai Yan as big as a gull, flying around Qiang, and the wind changed in the morning. On the morning of the 14th, I vaguely saw Aunt Mi Zhu enter the Ryukyu boundary. " In this passage, it is very clear that "I vaguely saw Gumi Mountain and entered the Ryukyu border". This shows that the western territory of Ryukyu Kingdom started from Gumi Mountain (now Kumi Island in Okinawa), and it is in line with historical facts that Heishuigou is the dividing line between China (Qing court) and Ryukyu Kingdom. Diaoyutai Island is obviously within the territory of China and does not belong to Ryukyu.

According to textual research, the original Qian Yong in the Qing Dynasty was copied in Daoguang for three years (A.D. 1823), and its preservation time was 6 1 year earlier than the so-called discovery of the Senkaku Islands (Diaoyu Island) in Japan.

In addition, the lost articles in "Guo Hai Ji" show that 1808, Shen Fu witnessed the situation and orientation around Diaoyu Island in detail on his way to Ryukyu via Diaoyu Island. This is 76 years earlier than the Japanese claim that Koga Chenshiro discovered the island in 1884.

Jin Canrong, deputy dean of the School of International Studies at Renmin University of China, believes that "the discovery of the new document is not only another proof that Diaoyu Island belongs to China, but also greatly helps the cultural exchange between China and and China's overseas understanding research at that time."