单丝不成线，独木不成林
dān​sī​bù​chéng​xiàn​dú​mù​bù​chéng​lín

one person cannot do it alone

  1. 单丝不成线 單絲不成線 dān​sī​bù​chéng​xiàn
    one person alone cannot achieve much
    a single thread cannot make a cord; one person cannot accomplish a task alone and needs cooperation from others
  2. ， dú
    non-Chinese
  3. 独木不成林 獨木不成林 dú​mù​bù​chéng​lín
    one person alone cannot achieve much
    literally 'a single tree does not make a forest'; used to mean that an individual's strength is limited and cooperation is needed to achieve great things