你并非我良人你是我内人
[nĭ bìng fēi wŏ liáng rén nĭ shì wŏ nèi rén]
In ancient China,'my liangren'(my respectable spouse) means a proper and respectful spouse whereas 'neiren' often implies intimate partner, usually referring to unofficial concubine. Thus, the net name is saying someone isn't my perfect one but actually more personal to me, with humor. Also it has a nuance that he/she belongs to oneself rather than any formal social norms.