Back in July, the JYF had already landed on Diaoyutai and built a lighthouse there, after which the Japanese government declared a 200-nautical mile exclusive economic zone including Diaoyutai.
早在七月中旬「日本青年社」就已經登上釣魚台上設置燈塔，當時日本政府緊接著宣佈具有排他性的二百海浬經濟海域，其中包括釣魚台列嶼。