xiā māo pèng shàng sǐ hào zi
a blind cat finds a dead mouse (idiom)
blind luck
瞎
xiā
blind
猫
māo
cat (CL:隻|只[zhi1])
碰
pèng
old variant of 碰[peng4]
上
shàng
(bound form) up; upper; above; previous
死
sǐ
to die
耗
hào
to waste
子
zi
noun suffix, as in 椅子[yi3 zi5] "chair"