孤掌難鳴 [－－难鸣]

Jyutping gu1 zoeng2 naan4 ming4
Pinyin gū zhǎng nán míng

Definitions (CC-CEDICT)
  1. It's hard to clap with only one hand.
  2. It takes two to tango
  3. It's difficult to achieve anything without support.
Definitions (粵典–words.hk)
  1. 語句
    一​隻​手​拍​唔​出聲​，​比喻​得​自己​一個​，​冇​其他人​幫​拖​就​好​難​成事
    cannot clap with one hand, a metaphor for needing others' support to do something
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）