再美的人也会单身再丑的人也会结婚
[zài mĕi de rén yĕ huì dān shēn zài chŏu de rén yĕ huì jié hūn]
It means 'Even the most beautiful person can be single while even the ugliest person can get married'. This expresses the idea that external beauty isn't the only factor in finding a partner; fate and personal charm also play a role.