不美不萌不温柔不离不弃不分别
[bù mĕi bù méng bù wēn róu bù lí bù qì bù fēn bié]
This rather long phrase means 'Neither Beautiful Nor Cute, Not Soft-Spoken But Neither Parting Nor Distinguishing'. It expresses an unconditional commitment to someone despite not having stereotypical appealing traits.