洋葱没有心让人流泪
[yáng cōng méi yŏu xīn ràng rén liú lèi]
Onions are famous for making people shed tears when they slice it up in the kitchen. This user name uses onions as a simile to express that although the world can make one heartbroken or feel lost even if everything (even something as seemingly empty as 'onions') doesn't have any intentions or emotions.