In what dynasty was Wannian Bridge in Qingzhou built? How many years ago?

formerly known as Nanyang Bridge, commonly known as Beida Bridge, Qingzhou cultural relics protection unit, is located in Qingzhou city, across Nanyang River, connecting Nanyang City and Dongyang City in ancient Qingzhou, and has been the main traffic artery in the city for thousands of years. When Wannian Bridge was founded is not clearly recorded in history, but at least in the period of Ming Dow in the Song Dynasty (132-133), the wooden Hongqiao was built, rebuilt in the 12th year of Yongle in the Ming Dynasty (1414), and rebuilt by Wei Yifeng, the magistrate of Qingzhou, and Liu Yanghao, the magistrate of a county, in the 22nd year of Wanli (1494), and renamed as Wannian Bridge. Wannian Bridge has been built several times, and now it is a seven-arch stone bridge with a slate deck. The bridge is 86 meters long, 9.4 meters wide and 9 meters high. The north and south sides of the bridge have wide approach surfaces, and there are stone bridges on both sides of the bridge, with 18 pairs of Aquarius and 19 pairs of Shishi. There are four large stone lions at both ends of the bridge, which are magnificent; There are relief "Twenty-four Filial Pieties" and branch-bound peony carved in imitation of the Ming Dynasty on the bridge railing; On the six piers facing the water on both sides of the bridge, dragon heads are carved. It is said that the dragon heads can absorb excess flood, and no matter how the flood surges, they will never cross the piers. In recent years, the Nanyang River under Wannian Bridge has been built into a riverside park, which has a beautiful environment with lakes filled with flowers, lush grass and green willows and bamboos. The south of the bridge is a prosperous tourist and cultural commodity market, and both ends of the bridge are connected with Qingzhou ancient street. Wannian Bridge is welcoming visitors from all directions with its rich historical and cultural charm and exquisite bridge-building art.