This sentence comes from the Song Dynasty poet Su Shi's Jia Shuo sent to Zhang Hu: "I have learned a lot, but I have also accumulated a lot. My confession ends here."
It means: only when you are well informed can you choose the essence and take it; Only by accumulating a wealth can I use it handy.
Extensive reading: refers to reading a lot, reading more and understanding things.
About taking: refers to slowly taking out a small amount.
Accumulation: refers to a large and sufficient accumulation of strength;
Hair thinning: refers to a small amount of slow release. Save more and release it slowly. Describe that only when you are fully prepared can you get things done well.
Su Shi was born in Meishan, Meizhou (now Meishan City, Sichuan Province), a native of Luancheng, Hebei Province, a writer, calligrapher, gourmet, painter and historical water control celebrity in the Northern Song Dynasty.