Huaguangjiao One (Simplified: 华光礁一号) is a Chinese merchant ship, built during the Southern Song Dynasty (1127-1279), that sank off the coast of Xinsha Islands, southeast of Guangdong province, in the South China Sea. The ship's name translates as "Magnificent China Reef Wreck #1". It was discovered in 1996 and is currently the oldest hull that China has discovered in the open seas.[2]