Xiànzài búyòng záobì-tōuguāng le, kě dúshū háishi yào kào kèkǔ.
Nobody has to bore through a wall for light any more, but studying still takes hard work.
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From 《西京杂记》: the Han scholar 匡衡 loved to read but could not afford candles, so he made a hole in the wall and read by the light from his neighbor's house. He later became chancellor.
