Also as a "hook lock." 1. Curved chains. Duan Tang-style "Exposition of the next sequel to Support Gao Snow": "﹝ ﹞ see Zhu Daoshi Skeleton under rocks, flat stones to sit back, hands on knees, shaped like a hook lock, with a moss contact spread, the color of snow . "
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Goutong link. Peng Yuan Fan "Wood Seven-day vow of silence six verses related articles Law": "Digital with order, interrupt, hook a chain lock." Qing Wang Fu "Jiangzhai Poetry" volume are: "from" 300 ", and the YU Bao Seven, will not be until the lock hook, natural Chanlian not absolutely. "