The Battle of Penghu (Chinese: 澎湖海戰) of 1683 was where the admiral Shi Lang of Qing attacked the fleet of Kingdom of Tungning in Penghu. Both parties possessed more than 200 warships each. Liu Guoxuan was outmaneuvered by Shi Lang, whose forces outnumbered him three to one. Liu Guoxan surrendered when his flagship ran out of ammunition and fled to Taiwan. The loss of Penghu resulted in Zheng Keshuang's surrender to the Qing.