軍令如山 [军－－－]

Jyutping gwan1 ling6 jyu4 saan1
Pinyin jūn lìng rú shān

Definitions (CC-CEDICT)
  1. military orders are like mountains (idiom)
  2. a military order must be obeyed
Definitions (Wiktionary)
  1. phrase, idiomatic
    military orders cannot be changed