Early career Dingyuan was ordered in 1880 and was
laid down at the
AG Vulcan shipyard in
Stettin, Germany in March 1881; her name means "eternal peace" in Chinese. Work proceeded quickly and she was
launched on 28 December 1881 to clear the
slipway so work could begin on her
sister ship .
Fitting-out work continued into May 1883, when the vessel was completed, but delivery was to be delayed until
Zhenyuan was finished in April 1884. The start of the outbreak of the
Sino-French War in August prevented both
Dingyuan-class ships from being delivered until 1885, since Germany would not transfer the vessels to a country at war. Both vessels were manned by German crews, sailing on 3 July 1885 under the German flag in company with the also German-built
protected cruiser . The three ships arrived in
Tianjin in November, where they were transferred to Chinese control.
Li Hongzhang, the
Viceroy of Zhili and director of China's naval construction program, inspected the vessels following their arrival. The two ironclads were then
commissioned into the
Beiyang Fleet, which was based in
Port Arthur. The ships steamed south to
Shanghai for the winter of 1885–1886. In the 1880s, the Beiyang Fleet was occupied with an annual routine of winter training cruises to the
South China Sea, often in company with the
Nanyang Fleet. This cruise typically involved visits to
Zhejiang,
Fujian, and
Guangdong provinces, and sometimes went as far south as stops in
Southeast Asia. The rest of the year was spent in northern waters off
Zhili,
Shandong, and
Fengtian provinces, conducting training exercises. Training cruises to foreign ports were conducted in the mid-1880s and early 1890s, both to train navigational skills on voyages far from shore and to
show the flag. Discipline aboard the ships of the Beiyang Fleet was poor, which contributed to a low state of readiness of the ships. During this period, the fleet was commanded by Admiral
Ding Ruchang, who employed
Dingyuan as his
flagship. At the time, China lacked
dry docks large enough to handle
Zhenyuan and
Dingyuan, forcing the navy to rely on shipyards in
Japan or in
British Hong Kong for periodic maintenance. The two
Dingyuan-class ships began their training routine in April 1886 in joint maneuvers with the units of the
Nanyang Fleet, which culminated in a
naval review in Port Arthur. They received the British vessels of the
China Station from 19 to 20 May.
Dingyuan,
Zhenyuan, and four cruisers made the first of their overseas cruises in August 1886, which included stops in British Hong Kong,
Busan and
Wonsan in
Korea,
Vladivostok,
Russia, and
Nagasaki, Japan. While at the latter port in August, Chinese crewmen became involved in an altercation with Japanese locals that resulted in the deaths of eight Chinese sailors and two Japanese police, with forty-two Chinese and twenty-nine Japanese injured. The so-called
Nagasaki Incident was characterized by the Japanese press as an attempt by China to intimidate Japan, leading to calls for naval expansion to counter the Beiyang Fleet. The Japanese government ordered three protected cruisers in response. The Japanese also refused to allow the Chinese ironclads to return for repairs in their shipyards, hampering the ability of the Beiyang Fleet to keep the vessels operational. The year 1887 passed less eventfully, with the ships spending the bulk of the year in the
Bohai Sea. Late in the year, another group of four European-built cruisers arrived, further strengthening the fleet and necessitating extensive maneuvers in 1888 to familiarize the crews with the rest of the fleet. The Beiyang Fleet adopted the same black, white, and
buff paint scheme used by the
Royal Navy at the time, repainting their vessels at some point in 1888. In 1889, the fleet was divided into two divisions;
Dingyuan and several cruisers were sent on a tour of Korean ports while
Zhenyuan and the rest of the fleet remained in the Bohai Sea for exercises. The two divisions rendezvoused in Shanghai in December, thereafter proceeding to Hong Kong for
Zhenyuan and
Dingyuan to be drydocked. They then cruised off Korea. Another visit to Japan came in June and July 1891; the fleet stopped in
Kobe on 30 June and
Yokohama on 14 July. At the latter port, a large Japanese delegation of senior military commanders and members of the imperial family received the ships. Another voyage to Japan took place the following year. Coupled with the Nagasaki Incident, these voyages contributed to the growing tensions between China and Japan, since Hongzhang intended them to make clear Chinese naval strength at a time the Japanese fleet was small and poorly developed. At the core of the dispute was control over Korea, which since the
Convention of Tientsin of 1884, was treated as a co-protectorate of China and Japan.
First Sino-Japanese War In early 1894, the
Donghak Peasant Revolution broke out in Korea, prompting China to send an expedition of 28,000 to suppress the rebels. Japan viewed this as a violation of the Tientsin Convention and deployed 8,000 troops in response, leading to the outbreak of the
First Sino-Japanese War on 1 August. The Chinese fleet was no match for the new
Combined Fleet of Japan, as years of insufficient naval budgets had not allowed Hongzhang to update the vessels—funds he had planned to use to add new
quick-firing guns to
Zhenyuan and
Dingyuan were instead appropriated for the 60th birthday of the
Dowager Empress Cixi—and the Chinese lacked effective commanders and sufficiently trained crews. And to add to China's disadvantages during the war, the Japanese had broken the Chinese diplomatic codes in 1888, giving them access to China's internal communications. As the Chinese made preparations in August for action, they removed the gun shields from the main battery turrets. Experience at the
Battle of Pungdo had revealed the thin shields created numerous splinters when struck by enemy fire, and these fragments had inflicted numerous casualties to the gun crews of the cruiser
Jiyuan at Pungdo. The crews also placed bags of coal around the gun batteries as a form of improvised armor. The ships were repainted light gray to make them more difficult to observe at sea. The ships of the Beiyang Fleet then steamed to
Taku to take on supplies, thereafter doing little for the next month.
Battle of the Yalu River Ding took the fleet on a sweep into the
Korea Bay on 12 September to clear the way for a
convoy of
troopships scheduled to deliver reinforcements to Korea. While on the way to the bay, he received faulty reports indicating the presence of Japanese warships off the
Shandong Peninsula, prompting him to change course to search for them. Finding no enemy vessels, he took the fleet to
Weihaiwei (now Weihai), and on 15 September, the fleet rendezvoused with the convoy to cover its approach to the mouth of the
Yalu River, where the transports deposited the men and supplies on 16 September. During the unloading process,
Dingyuan and the bulk of the fleet remained underway to provide distant support and avoid presenting themselves as stationary targets to Japanese torpedo boats known to be in the area. While the Chinese were on the way back to Port Arthur, the Combined Fleet under
Vice Admiral Itō Sukeyuki intercepted them on 17 September, leading to the
Battle of the Yalu River. The poorly trained Beiyang Fleet sailed in a disorganized
line abreast formation, while the Japanese approached them from the south in
line ahead; the Chinese ships steamed at around and the Japanese at . Itō turned his ships to pass in front of the oncoming Beiyang Fleet.
Dingyuan opened fire first, at about 12:20, at the extreme range of , far in excess of what
fire-control equipment was capable of accurately directing at the time. The blast effect from
Dingyuans initial
salvo destroyed her own
bridge, collapsing it and trapping Ding and his staff for the duration of the action, depriving the Beiyang Fleet of central control. The rest of the Chinese fleet quickly followed
Dingyuan, but failed to score any hits as their opponents passed in front. The Japanese ships returned fire at 12:25, having divided into two
squadrons and turned back to starboard to encircle the Chinese. Concentrating their fire on the cruisers on the Chinese right flank, they quickly destroyed the Chinese cruisers and . The battle quickly devolved into a melee at close range, and the Chinese cruisers and were sunk. In return, the Chinese warships inflicted serious damage on the old ironclad , which had been unable to keep pace with the rest of Itō's fleet, and was eventually forced to disengage and flee.
Zhenyuan and
Dingyuan hit the
auxiliary cruiser Saikyō Maru with four 12-inch shells and inflicted significant damage. The Japanese ships then concentrated their fire on
Dingyuan and
Zhenyuan. The ships' heavy citadel armor proved to be impervious to the Japanese shellfire directed against it, though the large-caliber
Canet guns mounted on the
Matsushima-class cruisers proved to be nearly useless and the other Japanese cruisers were engaged with their Chinese counterparts. Both ships were hit numerous times and several fires broke out, but both crews adeptly suppressed them despite being under heavy fire. By around 17:00, both sides were low on ammunition and the Chinese began to reform their surviving vessels into line-ahead formation. The Japanese eventually broke off at around 17:30 and withdrew. The battered Beiyang Fleet, by then reduced to the two
Dingyuan-class ships and four smaller vessels, limped back to Port Arthur, arriving there the next day.
Battle of Weihaiwei Repairs to the damaged ships began immediately, and fresh supplies and ammunition were sent to ready the vessels for action. By October, the
Japanese Army had begun to approach Port Arthur, forcing the Chinese to withdraw the Beiyang Fleet to Weihaiwei. Ding sortied on 20 October and crossed the
Bohai Strait to Weihaiwei without encountering Japanese forces. In early November, Ding sortied to cover the transfer of
Zhenyuan, which had remained in Port Arthur as long as possible to complete repairs. The Japanese Army had advanced to Weihaiwei by the end of January 1895, launching a major attack on the port on the 30th to begin the
Battle of Weihaiwei. They quickly captured the fortifications on the eastern side of the city despite heavy fire from
Dingyuan and other vessels of the fleet. The capture of the fortresses forced the Chinese ships to withdraw to the western portion of the harbor, where they would be out of range for the guns there.
Dingyuan disabled one of the
disappearing guns in the fortress at
Luchiehtsui, but several guns remained on operation, and Japanese gunners quickly set to work to bring them to bear on the trapped fleet. The Chinese ships bombarded Japanese forces as they advanced on the city's defenses. A group of ten Japanese torpedo boats broke into the harbor on the night of 4/5 February and hit
Dingyuan with a
torpedo on the port side toward the stern. The attack inflicted serious damage and the crew's damage control efforts failed to contain the flooding, hampered by leaking
watertight doors. They got steam up in the boilers and began to get underway, but with the uncontrolled flooding threatening to sink the ship, the crew was forced to
ground her to prevent her from sinking. The ship was thereafter employed as a stationary artillery battery and Ding shifted his flag to
Zhenyuan. Two of the attacking torpedo boats were discovered having been disabled in the previous night's action at dawn. The next night, the torpedo boats made another assault on the Chinese fleet, sinking a cruiser, a
training ship, and an auxiliary vessel. By 9 February, the Japanese had seized the fortifications that overlooked the rest of the harbor. They used the position to bombard the crippled
Dingyuan with
field artillery, further damaging the vessel. With their position in the harbor no longer tenable and most of the vessels damaged—
Zhenyuan had also been badly damaged and was no longer seaworthy—Ding decided to
scuttle Dingyuan the next day and then surrender. The decision provoked many of the senior officers of the Beiyang Fleet to commit suicide, including the ship's commander, Captain
Liu Buchan. The exact nature of the crew's efforts to disable the vessel are unclear. Some reports indicate that a
mine detonated amidships, and observers aboard the British protected cruiser noted seeing a large explosion aboard
Dingyuen. Photographic evidence, which shows the vessel aground in shallow water and with a gaping hole amidships, supports these reports, as does the observations of the British Vice Admiral
Edmund Fremantle, who inspected the fleet shortly after the battle. ==Replica and rediscovery ==