16-character formula, esp. Mao Zedong's mantra on guerrilla warfare: 敵進我退，敵駐我擾，敵疲我打，敵退我追|敌进我退，敌驻我扰，敌疲我打，敌退我追[dí jìn wǒ tuì , dí zhù wǒ rǎo , dí pí wǒ dǎ , dí tuì wǒ zhuī] when the enemy advances we retreat; when the enemy makes camp we harass; when the enemy is exhausted we fight; and when the enemy retreats we pursue