海不会不蓝我不会不在情不会不深我不会不真
[hăi bù huì bù lán wŏ bù huì bù zài qíng bù huì bù shēn wŏ bù huì bù zhēn]
This nickname conveys deep and unchanging emotions. It's a promise of steadfast affection, indicating that just as the sea is consistently blue, the user's feelings for someone are constant, unwavering, sincere, and deep.