紅字屋 [红－－]

Jyutping hung4 zi6 uk1
Pinyin hóng zì wū

Definitions (粵典–words.hk)
  1. 名詞、香港
    冇​樓​契​嘅​臨​時​房屋​（​寮​屋​）​嘅​俗​稱​（​量​詞​：​間​）
    shack; literally: house with markings of characters in red