猫有九条命也只有一心而已
[māo yŏu jiŭ tiáo mìng yĕ zhĭ yŏu yī xīn ér yĭ]
This translates to 'A Cat Has Nine Lives, But Only One Heart'. As a saying that draws on the belief that cats possess nine lives, this net-name emphasizes the monogamous heart of the speaker despite having ample opportunity for variety or changes in partners and circumstances. Even though he/she theoretically could have multiple lives or choices as per opportunities present within the lifespan, he chooses loyalty in matters concerning his core emotions - like a cat that would stay true to its original owner, regardless of how many lives it had. So, it shows one's faithfulness in relationships or commitment in certain affairs of the heart and soul.