Introduction to Krupp guns: The main guns of the Dingyuan ship are 4 Krupp 305mm breech guns (divided into 2 double-mounted exposed turrets on the left and right, with gun covers on them. The turrets are surrounded by armor and do not move. The artillery inside can automatically rotate and is powered by water pressure. Each gun weighs 31.5 tons, 25 times the caliber), and there are 2 Krupp 150mm breech secondary guns (exposed turret type, one at the front and one at the tail, each gun weighs 4.75 tons, 35 times the caliber), 4 75mm Krupp sampan guns, 8 37mm five-barreled Hotchkiss machine guns, 2 57mm and 47mm Hotchkiss rapid-fire cannons each, and 3 14-inch torpedo tubes (both sides One on each side and one on the stern, equipped with 21 torpedoes).