What are the main features of the couplets and necklaces in Qian Qi's "Playing the Moon in Pei Di's Study"?

The poet mainly creates an empty and quiet artistic conception through dynamic writing and profile description, expresses his feelings through the moonlight in front of him, and exudes a touch of sadness in the author's heart.

"The shadows are closed and the trees are alone in the autumn cold"-in front of the deep courtyard, the doors at all levels have long been closed and the outdoor is silent. A breeze blew, the branches and leaves rustled, and the coolness of autumn night was full of the chill of the wind. "Magpies are surprised by the leaves, and fireflies are far into the smoke." These two sentences turn to describe the moonlight from the silence around and the coolness of early autumn, using the method of profile description.