Introduction to Fengyue Chenghuai: The plaque is "Fengyue Chenghuai", and its couplet is: The shadow of bamboo across the window knows the moon is up; the fragrance of flowers makes everyone feel that spring is coming. This couplet is based on Yongzheng's calligraphy "The shadow of bamboo crosses the window to know the moon; the scent of rosin enters the dream and feels the wind coming." Just change "wind" to "spring". Couplets are the quintessence of China; they are the splendid wonders of the art world. It is the most vivid, concise, glorious and charming display of Chinese language art; it is the peak and model of Chinese aesthetics; so it is the quintessence of the Chinese nation and has its own stylistic characteristics.