Legend has it that when Emperor Zhenwu became immortal, he drew his sword and cut open his belly, leaving his intestines in Luoyang River. Later, these intestines became monsters, making waves from time to time, endangering passing ships.

One day, a ferry crossed the river, and the tortoise and snake were working. The wind roared, the turbid waves rolled and the ferry capsized. At this time, there was a loud cry in the sky: "Cai is on the boat, don't be rude!" " Hearing this, the two monsters, the tortoise and the snake, were so scared that they sneaked into the bottom of the river. After a while, the river was calm again. The guests on board were surprised and asked who was "Master Cai". There is no one surnamed Cai on board, only a pregnant woman and her husband surnamed Cai. Knowing this, the pregnant woman secretly made a wish to heaven: "If my baby can have a boy, when he grows up, he must be asked to build a bridge on the Luoyang River to facilitate the passing guests.

The pregnant woman gave birth to a boy named Cai Xiang, and his name is Mo Jun. Cai Xiang was clever since he was a child and was buried at the age of twenty. Later, he was sealed as a college student in Mingtang, which was highly valued by the emperor. When he was in Beijing, he told the emperor his mother's wish to build a bridge. The emperor was very moved and sent him to Quanzhou as a prefect. Later, Cai Xiang built a bridge over the Luoyang River, which is the famous Luoyang Bridge at home and abroad.

Extended data:

Luoyang Bridge, formerly known as Wan 'an Bridge, is located on the Luoyang River in the eastern suburb of Quanzhou, Fujian, and is the earliest existing cross-sea beam bridge in China. Cai Xiang, the magistrate of Quanzhou in Song Dynasty, presided over the bridge construction project. From the fourth year of the Northern Song Dynasty (A.D. 1053) to the fourth year of Jiayou (A.D. 1059), it took seven years before and after, at a cost of14 million yuan, to build this big stone bridge across the river and across the sea.

This bridge is made of granite. When it was first built, the bridge was 360 feet long and 1.5 feet wide, with statues of soldiers separated on both sides. This bridge-building project is famous for its huge scale and superb technology. Since the bridge was built more than 900 years ago, it has been repaired 17 times. At present, the bridge is 73 1.29 meters long, 4.5 meters wide and 7.3 meters high, with 44 piers, 645 handrails, 104 stone lions, 1 stone pavilion and 7 stone pagodas.

References:

Luoyang bridge _ Baidu encyclopedia