耕当问奴 gēng dāng wèn nú

DEFINITIONS

  1. if it's plowing, ask the laborer (idiom); when managing a matter, consult the appropriate specialist

CHARACTERS

耕 gēng plow, cultivate
当 dāng bear, accept, undertake; just
问 wèn ask about, inquire after
奴 nú slave, servant