一个愿打，一个愿挨
yī​gè​yuàn​dǎ​yī​gè​yuàn'ái

both parties are willing

  1. 一个 一個 yī​ge numeral
    one
    a single person or thing
  2. 愿 願 yuàn auxiliaryverb
    to be willing
    To be willing or happy to do something; to consent to something because it matches one's own desires.
  3. 打 dǎ verb
    to hit
    to strike; to knock; to beat; to break
  4. ， yī
    non-Chinese
  5. 一个 一個 yī​ge numeral
    one
    a single person or thing
  6. 愿 願 yuàn auxiliaryverb
    to be willing
    To be willing or happy to do something; to consent to something because it matches one's own desires.
  7. 挨 ái verb
    to suffer
    to suffer; to endure; to be subjected to something unpleasant