Battle of Penghu
The Battle of Penghu () was a naval battle fought in 1683 between the Qing dynasty and the Kingdom of Tungning. The Qing admiral Shi Lang led a fleet to attack the Tungning forces in Penghu. Each side possessed more than 200 warships. The Tungning admiral Liu Guoxuan was outmaneuvered by Shi Lang, whose forces outnumbered him three to one. Liu surrendered when his flagship ran out of ammunition and fled to Taiwan. The loss of Penghu resulted in the surrender of Zheng Keshuang, the last king of Tungning, to the Qing dynasty. Prelude Kangxi Emperor of the Qing dynasty assigned Yao Qisheng as Viceroy of Fujian in 1678. Yao Qisheng assisted Kangxi Emperor to execute the Sea Ban order: "Not even a plank is allowed to enter the water." () until 1683, to weaken their economy so cut off all the connection of trade with Tungning Kingdom. By 1683, Kangxi Emperor had stopped all attempts at negotiation with Tungning. Yao Qisheng also recommended Shi Lang as the commander-in-chief of the Qing navy, then Kangxi Emperor agreed and sent Admiral Shi Lang with a force of about 21,000 men and 240 warships to invade Tungning. Shi Lang attempted to attack