This sentence is from "Farewell at Changting" written by Bai Juyi, a poet of the Tang Dynasty. According to the poem, the word "jun" is usually interpreted as a male title such as friend, comrade, colleague, etc. In the poem, it refers to a blessing for friends after a long separation. Therefore, the sentence "Ten years of Changting and Nine Dreams" means that we have been separated for ten years. In this vast life, the many times of separation and longing have turned into dreams of longing and longing. He himself slept in the palace of sorrow, wandering in melancholy and troubles. Therefore, "jun" here means male.