芦管，起源于古代波斯（今伊朗），是古代西域各国通用的乐器筚篥，东晋之时传入中原，南北朝至唐代极为盛行。
松质石料：吸水石、芦管石、浮石、珊瑚石等。
Cancellous stone: water stone, flower, pumice, coral rock, etc.
芦管石是枯死的芦苇在富钙的环境当中形成纵横交错芦苇状的岩石。
Flower stone is withered reeds in the environment of calcium-rich crisscrossed reed of rock.
当天，我就来到了此人隐居的森林，见他正坐在柏树下，手持一截芦管，仿佛握着极杖一样。
On that very day I went to the forest where he dwells. And I found him sitting under a white cypress, and in his hand a reed as if it were a sceptre.
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