the Chinese government made a series of diplomatic protests, demanding the immediate release of the trawler and all its crew. China summoned Uichiro Niwa, the Japanese ambassador to China in Beijing, six times, each time with an official of higher diplomatic rank, on one occasion after midnight. The trawler and 14 of the crew members (but not the captain, Zhan) were released after the sixth summons on September 13, 2010. The captain of the trawler remained in Japanese detention and was finally released on September 24, 2010. Chronology of events September 7, 2010: The Chinese fishing trawler Minjinyu 5179 collides with two Japanese Coast Guard patrol boats in disputed waters near the Senkaku Islands. The collisions occur between 10am and 11am (Yonakuni around 10:16am, Mizuki around 10:56am.), after the Japanese Coast Guard ordered the trawler to leave the area. After the collisions, Japanese Coast Guard sailors boarded the Chinese vessel and arrested the captain, Zhan Qixiong. On the same day, Song Tao, Chinese associate minister of foreign affairs, called in Japan's ambassador to China Uichiro Niwa and requested Japan to stop its interception operation. September 9: Jiang Yu, spokeswoman of the Ministry of Foreign Affairs of China said that China has sent law enforcement boats of the Fishery Administration to the incident waters. On the same day, Hu Zhengyue, the assistant to the minister of foreign affairs called in Japan's ambassador to China Uichiro Niwa. Hu urged Japan immediately release the trawler together with seamen on board and guarantee their safety and integrity. The Ishigaki Maritime Safety Agency charges Captain Zhan Qixiong with interference with a public servant in the execution of his or her duties and send him to the Ishigaki branch of the District Public Prosecutor's Office in Naha. September 12: In the early morning, State Councilor Dai Bingguo called in Japan's ambassador to China Uichiro Niwa. Dai warned the Japanese government: "Don't make false judgement on the current situation, make wise political decisions, and release China's fishermen and trawler immediately." September 13: Because of the detention of the Chinese captain, China's embassy told the Affairs Bureau of the House of Representatives (Japan) that Vice Chairman of the Standing Committee of the National People's Congress Li Jianguo decided to delay his 5-day visit to Japan. The trawler and 14 crew members were released and returned to China. Captain Qixiong remains detained in Naha. September 16: Seiji Maehara, the