Literature Reference: 古气参彖系，高标摧太玄。—— 《送灵师》 韩愈 Ancient spirit resonates with the 'Tuan Xi', towering standards shatter the profound mysteries. Source from 'Song Lingshi' by Han Yu.
彖: The Tuan Commentary, a text within the "I Ching" that expounds on the meanings of the hexagrams.
系:
Connection: Involvement. Relationship.
Meaning: 'Tuan Xi' refers to the profound wisdom and philosophy in the 'Book of Changes'.