After six years as a volunteer teacher, Zhou Jingyuan retired. On the same day he left, a poverty alleviation variety show came to the poor village where he struggled. Then, the national audience was stunned. The school song he left for the school caused a sensation in the entire music world. The school motto he left to his students has become a cautionary tale that major colleges and universities are vying to quote. The extracurricular tutoring materials he wrote for students have become a treasure trove of major publishing houses. The poems he left by the small lake made all the bigwigs in the literary world bow and worship...... After being shocked to the point of almost numbness, everyone began to pursue a question: Who is this Teacher Zhou?