長蛇陣 [长－阵]

Jyutping coeng4 se4 zan6
Pinyin cháng shé zhèn

Definitions (CC-CEDICT)
  1. single-line formation (army)
  2. fig. long line
Definitions (Wiktionary)
  1. noun, figuratively
    long queue
  2. noun
    single-line battle array