Entering their four-decade-old apartment building and stepping into a stairwell barely wide enough for one person, the first thing you see is a mottled wall on which is painted "Drug-taking and defecation prohibited."
走進四十多年前建造的老公寓，狹窄不容轉身的樓梯間首先映入眼簾的，是寫著「禁止在此便溺、吸毒」的斑駁牆壁。