Koxinga (Lord of the Imperial Surname) is the customary Western spelling of the popular appellation of Zheng Chenggong, a Chinese military leader who was born in 1624 in Hirado, Japan to Chinese merchant/pirate Zheng Zhilong and his Japanese wife, and died in 1662 on the Island of Formosa (Taiwan).

A Ming loyalist and the chief commander of the Ming troops on the maritime front for the later emperors of the withering dynasty, Koxinga devoted the last 16 years of his life to resisting the conquest of China by the Manchus.

The area where Xiamen now exists was known as Tong'an (Chinese: ????