To sleep on a round log as a pillow to ensure one remains alert; metaphorically, it describes someone who is extremely diligent, self-disciplined, and dedicated to their studies or work, striving hard to achieve their goals.
他秉持圆木警枕的精神，夜以继日地钻研学问，最终成为了一位杰出的学者。
He upheld the spirit of "yuan mu jing zhen" (using a round log as a pillow to stay alert), diligently studying day and night, and eventually became an outstanding scholar.
Era:
Ancient
Frequency:
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