丹爐落磚 Bricks From the Eight Trigrams Brazier
土地道：「是你也認不得我了。此間原無這座山。因大聖五百年前大鬧天宮時，被顯聖擒了，壓赴老君，將大聖安於八卦爐內。煅煉之後開鼎，被你蹬倒丹爐，落了幾個磚來，內有餘火，到此處化為火焰山。我本是兜率宮守爐的道人，當被老君怪我失守，降下此間，就做了火焰山土地也。」豬八戒聞言，恨道：「怪道你這等打扮，原來是道士變的土地。」土地道：「是你也认不得我了。此间原无这座山。因大圣五百年前大闹天宫时，被显圣擒了，压赴老君，将大圣安于八卦炉内。煅炼之后开鼎，被你蹬倒丹炉，落了几个砖来，内有余火，到此处化为火焰山。我本是兜率宫守炉的道人，当被老君怪我失守，降下此间，就做了火焰山土地也。」猪八戒闻言，恨道：「怪道你这等打扮，原来是道士变的土地。」
逐句解 Line by line
"So it is that you no longer know me," said the Local Spirit.
認不得 is the negative potential complement: not that he declines to recognise but that he cannot. 得 is the toneless de of the potential construction, not the dé of attainment, and 不 stays bù before it either way.
"This place had no such mountain at the first."
間 is jiān, the spatial noun — this space, this region — not the jiàn of interval or estrangement.
"When, five hundred years ago, the Great Sage made his great havoc in Heaven, he was taken by the Manifest Sage, haled before Lord Lao, and set within the Brazier of the Eight Trigrams."
顯聖 is Erlang, the Manifest Sage, who took the Great Sage in the seventh chapter. 將 here is jiāng, the disposal marker that fronts the object, not jiàng a general. 壓赴 is the language of a prisoner escorted under guard.
"When the smelting was done and the vessel opened, you kicked the cinnabar brazier over, and several bricks came down; there was fire yet within them, and on reaching this place they were transformed into the Mountain of Flames."
倒 is dǎo, to topple — the brazier goes over. The same graph returns in the next passage as the adverb dào. 落 is luò; pypinyin bakes là at this site. 化為 takes wéi, the copular reading, not the purposive wèi.
"I was formerly the Daoist who kept the brazier in the Tuṣita Palace. Then Lord Lao held me at fault for my dereliction and sent me down to this place, and so I became the Local Spirit of the Mountain of Flames."
兜率 transcribes Tuṣita, and 率 is shuài in the transcription, not the lǜ of rate or proportion that pypinyin supplies. 當 is dāng, temporal. 降 is jiàng, to send down, not xiáng to subdue.
Zhu Eight Rules, hearing this, said resentfully, "No wonder you are got up in that fashion — a Daoist turned Local Spirit, after all."
怪道 is the vernacular no wonder, idiomatically distinct from 怪 to blame, though the Local Spirit has just used that sense of the graph.
The Local Spirit's account is an etiology, and it is unusually mechanical for this novel. Most obstacles in the pilgrimage are placed by a will — a demon's appetite, a bodhisattva's test, a heavenly beast slipped from its tether. This one has a physical cause traced through a chain of ordinary events: a furnace overturned, bricks dislodged, fire still living inside them, the bricks falling to earth and becoming a mountain. Nothing intends the Mountain of Flames. It is debris.
The chain reaches back to the seventh chapter with some precision. The Great Sage was taken by Erlang, sealed in Lord Lao's Brazier of the Eight Trigrams, smelted for forty-nine days, and kicked his way out when the vessel was opened. What the earlier chapter reported as an escape is re-described here as a consequence: the same kick that freed him scattered the bricks. Five hundred years of narrative time separate the act from the reckoning, and the novel is content to let the interval do the work of an argument.
The Local Spirit's own position mirrors the Sage's exactly, which is the passage's quiet symmetry. He too was in the Tuṣita Palace on that day; he too was punished for what happened at the brazier; he was demoted and sent down to keep watch over the very ruin the Sage created. Two beings were disgraced by one event, and they meet five centuries later on the site of it, one asking the way forward and the other asking to be released.
Zhu Eight Rules punctures all of it in a single line. The solemn confession, the cosmology, the five hundred years of consequence — and his contribution is to note that the fellow is dressed like a Daoist because he used to be one. The novel habitually assigns him this office: to say the flat, material thing that lets the air out of a scene just as it becomes portentous.