2009年6~7月,福建博物院和永定文物局组成联合考古队,对永定县龙安寨进行考古调查,并于寨址中部设探沟进行考古发掘,揭露出两期相互叠压的寨址遗迹,出土了一批陶、瓷器等生活用品,首次通过考古发现,证明早在北宋晚期,永定县即已存在用生土技术建造的寨堡合一的防御性建筑。 From June to July 2009, the Fujian Provincial Museum and Yongding Cultural Relics Bureau formed a joint archeological team to carry out archaeological investigations on Longan Village in Yongding County and set up exploration ditches for archeological excavations in the central part of the site to reveal two overlapping zaizhu Remains, unearthed a number of pottery, porcelain and other daily necessities, for the first time through archaeological discoveries, as early as the late Northern Song Dynasty, Yongding County that there have been built using earth-milled technology Zhai Fort unity defensive buildings.