寫信佬 [写－－]

Jyutping se2 seon3 lou2
Pinyin xiě xìn lǎo

Definitions (粵典–words.hk)
  1. 名詞、舊式
    一種​職業​，​以前​基層​普遍​教育​程低​，​衍生​出​專門​幫人​寫信​、​寫​字​嘅​行​業​（​量​詞​：​個​）
    writing service, in the old days when public education was not compulsory, educated people did writing, filling in forms for others for living