1895年1月20日,大山岩大将指挥的日本第二军共2.5万人,在日舰掩护下开始在荣成龙须岛登陆,23日全部登陆完毕。30日,日军集中兵力进攻威海卫南帮炮台。驻守南帮炮台的清军3000人,最后被歼灭。日军也死伤累累,其左翼司令官大寺安纯少将被清军炮弹打死。由于兵力悬殊,南帮炮台终被日军攻占。2月3日,日军占领威海卫城。威海陆地悉被敌人占据,丁汝昌坐镇指挥的刘公岛成为孤岛。日本联合舰队司令伊东佑亨曾致书丁汝昌劝降,遭丁汝昌拒绝。5日凌晨,旗舰定远中雷搁浅,仍做“水炮台”使用。10日, On January 20, 1895, a total of 25,000 Japanese Second Corps commanded by General Daishanyan landed on Rongsuluxu Island under the cover of a Japanese ship and all of them landed on the 23rd. On the 30th, the Japanese troops concentrated on attacking the fort of Weihai Weihai. 3,000 troops stationed in the South Fort Battery, and finally annihilated. The Japanese are also dead and wounded, and their left-wing commander, Major General Jun, is shot dead by the Qing forces. Due to disparities in strength, the South Fort was finally captured by Japanese troops. February 3, the Japanese occupation of Weihai Acropolis. Weihai land was occupied by the enemy, Ding Ruchang sits under the command of the island to become an island. Japan’s joint fleet commander Ito Youheng had written Ding Ruchang despire, Ding Ruchang refused. Early on the 5th, flagship Dingyuan Zhonglei ran aground and still used “Water Fort”. On the 10th,