bǎi zhàn bù dài
to come unscathed through a hundred battles (idiom, from Sunzi's "The Art of War" 孫子兵法|孙子兵法[Sun1 zi3 Bing1 fa3]); to win every fight
百
bǎi
hundred
战
zhàn
to fight
不
bù
no; not so
殆
dài
(literary) dangerous; perilous