What is Yu's poem?

He is the author of a series of essays, such as Cultural Journey, Notes on Mountain Living, Frosty and Cold Riverside, A Millennium Sigh, Traveler Boundless, Touching the Earth and Searching for China. , general history of culture, long memory literature, such as "Ask Yu Yisheng" and "I can't wait". , and an academic monograph "Drama Theory and Drama History Draft".