猫有九条命但没有9颗心
[māo yŏu jiŭ tiáo mìng dàn méi yŏu 9 kē xīn]
'Cats have nine lives but not nine hearts,' playing on the belief that cats have nine lives but implying something about the feline's loyalty or ability to love; could also be an expression of someone perceiving themselves or others as fickle or disloyal.