磨刀不误砍柴工 (磨刀不誤砍柴工) módāo bù wù kǎn chái gōng

módāo bù wù kǎn chái gōng phrase sharpening the axe won't make the wood-splitting take longer; time invested in preparations is not lost
Domain: Proverb 谚语
Notes: (CC-CEDICT '磨刀不誤砍柴工')