1September, 894 17 In the Dadonggou naval battle, Deng Shichang commanded Zhiyuan Ship to fight bravely. Later, under the siege of Japanese ships, Zhiyuan ship was injured in many places, the whole ship caught fire and the hull tilted. Deng Shichang encouraged the officers and men of the whole ship to say, "Our generation joined the army to defend our country and put life and death at risk. Today, there is only death! " "Japanese warships rely entirely on Yoshino. If it sinks, it will be enough to catch my breath and succeed." It resolutely sailed into the starboard side of the Japanese capital ship "Yoshino" at full speed, determined to end up with the enemy. The officers and men of the Japanese ship were shocked and concentrated their fire on the Zhiyuan ship. Unfortunately, a shell hit the torpedo tube of Zhiyuan ship, and the torpedo in the tube exploded and Zhiyuan ship sank. After Deng Shichang fell into the sea, his entourage rescued him with a lifebuoy. He refused, saying, "I am determined to kill the enemy and serve the country. Now that I am dead in the sea, I am just. Why should I live! " The dog Sun swam to him and took his arm to save him. Deng Shichang vowed to live and die with the warship * * *, resolutely put the dog into the water, sank himself into the waves, and died heroically with more than 250 officers and men of the whole ship.

After Deng Shichang's death, the whole country was shocked. Emperor Guangxu wept bitterly and wrote a pair of couplets, "There are tears today, and the navy is mighty." Posthumous title and Deng Shichang were named as "upright and upright people", and posthumous title was named "Prince of Shaobao", who entered the Zhao Zhong Temple in the capital. Yu Bi's relatives wrote a memorial and an inscription.