Zhōu Wúsuǒzhù 周無所住 (literally “Zhōu of No-Abiding-Place”) was a Southern-Sòng Daoist author, of KR5d0095 Jīn dān zhí zhǐ 金丹直指 — a direct-instruction treatise on the gold elixir, preface dated 1250. The pen-name (“No Abiding Place”) echoes the Buddhist Vajracchedikā phrase yīng wú suǒ zhù ér shēng qí xīn 應無所住而生其心.