Built in 1009 in Nanxiong County, Sanying Tower is the only brick tower verified as a structure of the early Northern Song Dynasty (960-1127) in the province. It is a hexagonal structure with nine stories and 42.5 m in height. Imitating the architectural style of a pavilion, its six eaves were upturned. Brick brackets were built in a simple yet powerful style. The iron-cast tower comprises a canopy, a vase, a nine-layered wheel and a pearl.