Zhong Jiao (Central Reef), which lies in the middle of Yinqing Qunjiao (London Reefs) of Nansha Islands (Spratly Islands), was invaded by Vietnam in 1978 and occupied by it since then. It is long in pattern, about 240m in length, 120m in width, and lies from east to west.
The reclamation, which started in 2012 and finished in the early 2013, has critically enlarged the area of the reef by 0.017km2.
By 2018, there had been over 10 buildings of various kind, including barracks, a wharf, a communication tower, a helipad, and etc.
