What does 诚心诚意 (chéng xīn chéng yì) mean in English?

Card 353HSK Level 4353/3571
CARD353
PROGRESS10%
诚心诚意
誠心誠意
chéng xīn chéng yì
sincere desire
Click to reveal
← Previous↑ DeckNext →

Reveal: Click/Space/Enter/↑↓/w/s/j/k•Navigate: ←→/h/l/a/d