北洋水師
In 1890, the Beiyang Fleet visited Hong Kong. When Fleet Admiral Ding Ruchang left his ship, Liu took down the fleet admiral flag and put up his admiral flag. The fleet's chief training officer, Royal Navy captain and Englishman William Lang raised issue with this, and complained to Li Hongzhang. In the subsequent dispute, Li supported Liu, and in response William Lang resigned from the Beiyang Fleet.