One is the combination of reality and virtuality, and the other is the artistic conception of time and space.
Time and space antithesis means that the poet describes the scenery from two perspectives of time and space to create an artistic conception. Time is the change of time in a day or a year, and space is far and near, high and low, up and down, inside and outside.
The combination of virtual and real scenes is to use two ways of describing scenes, virtual and real, to describe scenes. Virtual scenes are virtual scenes that the poet creates through association or imagination, and real scenes are the concrete and sensible realistic objective scenes described by the poet. The combination of virtual and real scenes It can express a kind of overflowing emotion.