下笔成章 write a whole article with one stroke of the pen
Explanation
形容写文章速度很快，文笔流畅，一挥而就。
Describes someone who can write very quickly and fluently.
Origin Story
三国时期，曹植以才华横溢闻名。一次，曹操带他游览铜雀台，兴致勃勃地命他赋诗。曹植略加思索，便挥笔疾书，顷刻间一篇气势磅礴的《铜雀台赋》便跃然纸上，令曹操赞叹不已。这便是“下笔成章”的佳话，流传至今。曹植不仅下笔成章，还出口成章，文采风流，堪称一代文学大家。他从小熟读诗书，积累了丰富的知识和文学素养，才使得他能够做到下笔成章。他的诗歌和赋作，至今仍被人们传诵。
During the Three Kingdoms period, Cao Zhi was known for his extraordinary talent. Once, Cao Cao took him to visit the Tongque Tower and excitedly ordered him to compose a poem. After a brief moment of thought, Cao Zhi began to write swiftly, and in a short time, a magnificent "Ode to Tongque Tower" appeared on the paper, greatly impressing Cao Cao. This is the origin of the idiom "xia bi cheng zhang", passed down to this day. Cao Zhi was not only able to write effortlessly, but also spoke eloquently and possessed exceptional literary talent, making him one of the great literary masters of his time.
Usage
多用于赞扬他人写作才能出众，形容写作速度快，文笔流畅。
Often used to praise someone's outstanding writing ability, describing fast writing speed and smooth writing style.
Examples
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他下笔成章，文采斐然。
tā xià bǐ chéng zhāng, wéncǎi féirán
He wrote an article with just one stroke of the pen.
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看到题目后，他下笔成章，很快就写完了一篇文章。
kàn dào tímù hòu, tā xià bǐ chéng zhāng, hěn kuài jiù xiě wán le yī piān wénzhāng
Upon seeing the title, he wrote an article in no time at all.