北洋水師
During the reign of the Guangxu Emperor, the Beiyang Fleet was founded as China's first modern navy and a telegraph center, a naval academy, and the headquarters of the Beiyang Naval Units were set up on Liugong Island. This resulted in the construction of many facilities and an increase in the island's population. Eight out of 15 modern warships which were bought from the United Kingdom and Germany were assigned to the Beiyang Fleet. On September 14, 1888, Ding Ruchang was given the command of the Beiyang Fleet. From 1887 onwards, more than 100 cannons were set up around the harbor of Weihai as well as on the islands of Liugong and Ri. Eventually, Ding Ruchang made Liugong Island his official residence. A T-shaped dock, known as the "iron dock", was constructed in the years 1889 to 1891.