平行线只望不及相交线及后行远
[píng xíng xiàn zhĭ wàng bù jí xiāng jiāo xiàn jí hòu xíng yuăn]
'Parallel Lines can only look longingly at intersecting lines before parting ways' implies a longing relationship between two people who may never have a chance to be together. It represents unrequited love or destined separation.