一遭生，兩遭熟
yī​zāo​shēng​liǎng​zāo​shú

strangers first, friends later

  1. 一 yī numeral
    one
    one; the number 1; single; alone
  2. 遭 zāo
    times
    measure word for the number of times an action occurs; a turn (equivalent to 次 cì or 回 huí)
  3. 生 shēng nounadjective
    unfamiliar
    unfamiliar; strange; unacquainted
  4. ， liǎng
    non-Chinese
  5. 两 兩 liǎng numeral
    two
    two; used before most measure words, with the number ten, or with large units like thousand or ten thousand; also used for things that come in pairs
  6. 遭 zāo
    times
    measure word for the number of times an action occurs; a turn (equivalent to 次 cì or 回 huí)
  7. 熟 shú adjective
    familiar
    familiar; well-acquainted; well-known through frequent contact