不疾不徐
bù​jí​bù​xú

neither too fast nor too slow

  1. 不 bù adverb
    not
    Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings
  2. 疾 jí verb
    fast
    (bound form) fast; quick; rapid; swift; violent
  3. 不 bù adverb
    not
    Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings
  4. 徐 xú
    slowly
    (literary) slowly; gently; at a relaxed pace