His grief took a severe toll on his body, reducing him to a mere skeleton.(哀毀骨立)

He could read ten lines at a time.(一目十行)

He forgot about morality after seeing the benefits.(見利忘義)

His head went bald due to long-term friction from wearing a hat, and his heels got scratched from long-term walking in shoes.(摩頂放踵)

Covering a person's ears and eyes.(掩人耳目)

He was unwilling to pluck a hair from his body.(一毛不拔)

He treats precious gold as if it were mud.(揮金如土)

After hearing one thing, you can infer ten related things.(聞一知十)

One sentence explains the mystery of this matter clearly(一語道破)

He picked up the pen and finished the article very quickly.(一揮而就)

They are well-informed and have a good memory.(博聞強視)

Make your parents' bed and pillow every night and greet them every morning. (晨昏定省)