Teacher, what is the main content of the Bridge of Twelve Classes?

The Bridge of Twelve Classes is a web novel. Its main content is as follows: The Twelve Classes Bridge told the story of a young teacher, Li Yunfeng, who had a deep relationship with his students while teaching in a rural school. Li Yunfeng was a young man full of love and patience. He was committed to imparting his knowledge and wisdom to his students. However, his rural education environment was very different from the urban education environment. He faced many difficulties and challenges. In this story, there were many touching stories between Li Yunfeng and his students, including their friendship, love, and teacher-student relationship. Through his teaching experience and life experience, Li Yunfeng imparted a lot of valuable knowledge and values to the students. At the same time, he also experienced many setbacks and tribulations in life. With its unique plot and characters, The Bridge of Twelve Classes presented a real and touching rural education story, and also conveyed the concern and love for education.