Wúlùn duō máng, tā zǒngshì bùjǐnbùmàn, cóngróngbùpò.
No matter how busy, she is always unhurried and composed.
Tips
history
From Li Ruzhen's 《镜花缘》 (Qing dynasty novel), chapter 19: a comic sequence where every pace — fast, slow, in-between — is somehow wrong. The phrase describes a deliberate middle tempo.
usage
Usually positive — implies composure and control. Compare with 慢条斯理 (deliberate, sometimes annoyingly slow) and 磨磨蹭蹭 (dawdling, negative).