Xiuying Fort (秀英炮台) is a well-preserved 19th-century coastal battery on the western edge of Haikou, built by the Qing government to guard the northern approaches to Hainan Island against French naval incursions. The fort dates to the 1880s and is one of the best-surviving examples of late Qing military architecture in south China.
The site covers several hectares and includes the original earth ramparts, cannon emplacements, ammunition storage tunnels, and officer's quarters. The guns — heavy artillery pieces on iron carriages — are still in place and in reasonable condition. The fort is not heavily visited by tourists and has a pleasantly undisturbed quality; you can walk the ramparts with the sea visible to the north and get a genuine sense of what the garrison faced.