呆子一辈子不离不弃傻子一辈子生死相离
[dāi zi yī bèi zi bù lí bù qì shă zi yī bèi zi shēng sĭ xiāng lí]
'The foolish one stays forever without leaving, while the silly one remains together through life or death.' It contrasts loyalty (being a little naive and steadfast) to another's extreme attachment, pointing to different attitudes in relationships or friendship.