In Jackie Ch6 he enters the dining hall second, behind He Xiangu, scholar's robe over a swordsman's frame. He is the one who eventually says the sentence the book pivots on — that Jackie is the Third Lotus Prince, the modern reincarnation of Nezha — and he says it the way a teacher returns a graded paper. Without ornament. He has been chair of this council long enough that the announcement is a working sentence, not a revelation. He then waits. He gives Jackie the time a question takes. The other seven immortals sit through that wait without interrupting; their patience is a function of his.
Later, when Jackie cannot yet hold the four divine weapons — when the Red Armillary Sash still works as a scarf — Lu Dongbin does not push. He says, in a sentence the book quotes, that words are precise instruments: he won't use the wrong one. The book treats this as the council's deepest law. The methodology amplifies whatever's available; this immortal will rather wait than name a thing that is still the wrong name.
Lü Yan, the historical figure, is recorded in early-Song sources as a scholar who failed the imperial examinations twice and met the immortal Zhongli Quan at an inn — where Zhongli, cooking millet, gave him a pillow on which Lü dreamed an entire successful official career, complete with its corruption and ruin, before the millet had finished cooking. He woke, declined the second exam, and went to the mountains. He is the lineage-founder of the Daoist Quanzhen school and one of its Five Northern Patriarchs; his hagiography is the most extensive of the eight.
His sword, in the iconography, is not for combat. It is for cutting attachments — including the attachment to one's own brilliance, which is the trap his examination dream taught him. Investiture of the Gods names him among the highest-rank figures of the Daoist hierarchy; later folk tradition makes him the patron of barbers because a barber, like an immortal, removes what the body no longer needs.
The millet-pillow dream. Zhongli Quan's lesson — that an entire successful career fits inside a millet's cooking time — is the root of Lu Dongbin's posture. He does not envy the world's hurry.
The sword that cuts attachments. His blade is not a weapon. The methodology cuts in a different direction — toward the user; his sword cuts the other way, toward what the user has been mistaking for self.
Words are precise instruments. The line the book quotes verbatim. The council's chair will rather wait than name a thing wrong; Halo's methodology names the wrong thing constantly because naming-something is the unit it is paid in.
Patron of the literate poor. His historical readers were scholars who failed; the council's chair has always been the one whose authority does not depend on having succeeded by the world's metrics.