Luoyang Bridge, also known as Wan 'an Bridge, spans the Luoyang River at the junction of Huian and Quanzhou in Fujian. It was built in the fifth year of the Northern Song Dynasty (1053) and was presided over by Cai Xiang who lived in Quanzhou at that time. It took six years and eight months to complete. The bridge is about1200m long and 5m wide. It has 46 docks, 500 handrails, stone lions, stone pavilions, stone pagodas and samurai statues. It is the first big stone bridge in ancient China. Luoyang River is also called Yangle River. According to legend, Emperor Xuanzong of the Tang Dynasty used to swim here and enjoy the mountains and rivers, which is a language similar to Luoyang. Therefore, he named the river Luoyang, and the bridge was named after the river. Luoyang Bridge is located at the intersection of the river and the sea. The river is wide and deep, and the wind and waves are urgent. This project is extremely arduous. At that time, the bridge builders threw a lot of stones along the middle line of the bridge, pioneered the raft foundation to build piers, and planted a lot of oysters to strengthen the bridge foundation. This is a precedent for applying biology to bridge engineering in the world, which can be described as ingenious and unprecedented. Here is another interesting legend. When the bridge was built, the waves were rough and the bridge foundation was difficult to build. Cai Xiang sent Xia Dehai, the first mate, to throw himself into the river and ask Poseidon for help. The chief lamented, "Why did you jump into the sea? "So, buy wine to drink, get drunk on the beach, ready to wait for the tide to drown. Unconsciously, I fell asleep. It seems that two sea patrol girls took him to the seaside to meet the sea dragon king. When I woke up, I found that the essay had been replaced by a reply, and Xia Dehai quickly returned to the office to reply. Cai Xiang opened it, and there was only one word of vinegar. Cai Xiang thought and thought, and suddenly realized, God told me to start work on the 2nd1. At this time, as expected, the tide receded. Cai Xiang led all the migrant workers to grab the bridge foundation, which was very handy. The bridge foundation has been filled in and the piers have been built. In fact, this is the exertion of the experience and wisdom of the masses.