Introduction to the Jewelry Protection Tower: The Jewelry Protection Tower, also known as the Jewelry Protection Light Tower, is a thousand-year-old tower with an inclination exceeding that of the Leaning Tower of Pisa, making it the world's largest leaning tower. It is located at the middle peak of Tianma Mountain. It was built in the second year of Yuanfeng in the Song Dynasty and was named Baoguang Pagoda during the Qianlong period of the Qing Dynasty. The Jewelry Light Tower is octagonal and originally had seven levels, but now only the brick body remains. The pagoda has been destroyed and its current height is 18.81 meters. Because its body is severely tilted, it is commonly known as the Leaning Tower. It is now a cultural relic protection unit in Shanghai.