The Gaven Reefs, also known as the Burgos Reefs (Filipino: Mga Bahura ng Burgos, lit. 'Reefs of Burgos'), is a group of two reefs in the Tizard Bank of the Spratly Islands in the South China Sea. The two individual reefs are known as 南薰礁; Nánxūn Jiāo and 西南礁; Xīnán Jiāo in Mandarin, and Đá Ga Ven and Đá Lạc in Vietnamese). They are occupied and controlled by China (PRC) as part of Sansha, and claimed by Taiwan (ROC), the Philippines and Vietnam. They have a supply platform and a reef fortress. The northern reef (Nánxūn Jiāo) comprises 86 hectares (210 acres) and its highest point is 1.9 meters (6 feet 3 inches) above sea level. The southern reef (Xīnán Jiāo) comprises 67 ha (170 acres). Since 2014, north reef has been subject to significant reclamation activities.