知己知彼，百战不殆

Chinese

For pronunciation and definitions of 知己知彼，百战不殆 – see 知己知彼，百戰不殆 (“Know yourself and know the enemy, and you can fight a hundred battles with no danger of defeat.”). (This term is the simplified form of 知己知彼，百戰不殆).

Notes: Simplified Chinese is mainly used in Mainland China, Malaysia, and Singapore. Traditional Chinese is mainly used in Hong Kong, Macau, and Taiwan.