Correct
避其锐气，击其惰归
/ bì qí ruìqì, jī qí duò guī /
Strokes
Definition
avoid the enemy when he is fresh and strike him when he is tired and withdraws (idiom)
Example
Definition
evade the enemy when his morale is high and strike when he is exhausted and in retreat; elude an enemy when it is full of fresh vigour but attack it when it is fatigued and withdrawing