- 知己知彼，百战不殆 zhījǐzhībǐ, bǎizhànbùdài know your enemyknow yourself and know your enemy, and you will never be defeated
- 知彼知己，百战不殆 zhībǐzhījǐ, bǎizhànbùdài strategic awarenessknowing the enemy and yourself will get you unscathed through a hundred battles (idiom, from Sunzi's "The Art of War")