When the window is decorated with clouds and the mirror is decorated with yellow flowers.
Open my East Pavilion door and sit on my West Pavilion bed.
Intertextuality
Intertextuality, also known as intertextuality, is a rhetoric method commonly used in ancient poetry. The ancient Chinese interpretation of it is: "See each other with words, see words with words." Specifically, it is a form of mutual use of words: the upper and lower sentences or two parts of a sentence seem to say two things, but in fact they echo, explain and complement each other and say the same thing. A rhetorical method to express the meaning of a complete sentence by interweaving, infiltrating and supplementing the contextual meaning.