[-线]

Jyutping saam1 sin3
Pinyin sān xiàn

Definitions (Wiktionary)
  1. noun, attributive, often
    third line; third tier
    • 三線城市
      三线城市
      sān xiàn chéng shì
      third-tier city
Examples (粵典–words.hk)
  1. Cantonese
    三线行车
    三線行車
    saam1 sin3 hang4 ce1
    • three lane road
  2. Cantonese
    三线歌手
    三線歌手
    saam1 sin3 go1 sau2
    • third-rate singer
  3. Cantonese
    二三线城市
    二三線城市
    ji6 saam1 sin3 sing4 si5
    • second and third-tier cities
Examples (Wiktionary)
  1. Mandarin
    三线城市
    三線城市
    sān xiàn chéng shì
    • third-tier city