Mujiang Yin: It is a poem by Tang Dynasty poet Bai Juyi. It was written by Bai Juyi in about 822 (the second year of Changqing) on ??his way to Hangzhou to serve as governor. At that time, the politics of the imperial court were gloomy, and the party struggle between Niu and Li was fierce. The poet had tasted the taste of being a court official and asked for a foreign post. The poem reflects the author's relaxed and happy mood after leaving the court. The poet uses novel and ingenious metaphors in this poem to create a harmonious and peaceful artistic conception, and expresses his innermost feelings and love for nature through chanting.