“the long night perfectly matches the persisting morning.” How so? And why would the morning be the thing persisting during dawn, when these meet?

“concentrating on the autumn time (when the yin and yang forces of day and night were said to be balanced)” huh

“hatpins and tablets fill the hall.” Signifiers of office?

The movement between subjects here in stanza 1 is very unclear, and between stanzas

“pine-tree green,” his clothes, I guess