The Luoyang Bridge, also known as Wan'an Bridge, is located in Quanzhou, Fujian province, China. The stone bay bridge is situated at the mouth of Luoyang River. Being the first stone bay bridge in China, it enjoys the reputation of " one of the four ancient bridges of China". The project started from the fifth year of Huangyou's ruling period in northern song dynasty. Cai xiang, the chief of Quanzhou prefercture in the 3rd year (1058) of Jiayou's reign, took over the task of constructing the bridge, who had overcame several difficulties concerning bridge deck pavement and bridge pier by applying raft foundation and raising oysters in the river to solid the base. In the fourth year (1059) of Jiayou's reign, the construction of Luoyang bridge was completed and Caixiang wrote "The Wan'an bridge" for it. The bridge had been reconstructed and repaired in the later dynasties. In southern song dynasty, pagodas and fengshui pagodas were built outside the guardrail of the bridge. The bridge is 1200 meters long, and has 46 piers in total. The north part of the bridge is in the territory of Hui'an county while the south is in Luojiang district. The middle part is located in a river island called Zhongzhou. Pagodas and tower joss can be found both on the bridge and Zhongzhou island. Luoyang bridge was listed as a key cultural relics unit under the national protection in 1988, and in 2009, it was selected as one of the cultural world heritage along the maritime silkroad.