五瓣鑽兒 A Plum Blossom Headed Drill
他又把鐵棒,吹口仙氣,叫:「變!」即變做旛竿一樣,撐住金鐃。他卻把腦後毫毛,選長的拔下兩根,叫:「變!」即變做梅花頭五瓣鑽兒,挨著棒下,鑽有千百下,只鑽得蒼蒼響喨,再不鑽動一些。他又把铁棒,吹口仙气,叫:「变!」即变做旛竿一样,撑住金铙。他却把脑后毫毛,选长的拔下两根,叫:「变!」即变做梅花头五瓣钻儿,挨着棒下,钻有千百下,只钻得苍苍响喨,再不钻动一些。
逐句解 Line by line
So he took the iron cudgel, blew a magic breath on it, and cried, "Change!"
The formula is fixed across the whole novel — pick up the object, blow a magic breath on it, say the word — and the source runs the call into the same unit as the preparation rather than letting it stand alone.
It turned at once into something like a banner-pole and propped the cymbals apart.
旛竿 is the tall pole a monastery flies its banner from, so the image is borrowed from the architecture of the very place he is trapped in. 撐住 is to hold something open by bracing it, not to lift it.
Then he took the hairs at the back of his head, picked out two of the long ones and pulled them free, and cried, "Change!"
He picks out which hairs to use, which is the novel being unexpectedly precise about a trick it has described dozens of times. 長 is cháng here, the adjective — the long ones — and it is the only place in this stretch where the graph is not the zhǎng of growing.
They turned into a five-petalled plum-blossom-headed drill. Pressing it close along the cudgel he bored a thousand times and more, and all the boring got him was a hard ringing: it would not bite in at all.
A real toolmaker's detail: a drill bit with its flutes cut in a five-petalled plum-blossom pattern. It produces nothing but a ringing noise. 鑽 stands four times in this one sentence and the first takes a different reading from the other three — the Kāngxī dictionary quotes the 六書故 to exactly this effect, that the departing tone is the boring instrument and the level tone is the act of boring. So 鑽兒 is zuàn and the three verbs are zuān.
Two more attempts, and they fail in a new way. The cudgel braced inside will not force the cymbals apart and the drill will not cut them. What beats him now is not the object's knack of matching his size but simply that it is harder than anything he has.
The drill is a lovely invention and it is worth noticing where the novel spends its care. Two long hairs from the back of his head become a bit with a five-petalled flower head, described down to the shape of the cutting edge — and the most concrete description in the chapter is lavished on a tool that does not work.