xià​bǐ​chéng​zhāng

to write with great speed and skill

下笔成章 下筆成章 xià​bǐ​chéng​zhāng
to write with great speed and skill
to write a perfect essay or poem in one go without the need for correction; describes someone with quick-witted literary talent or a flowing and agile pen

Frequency

Written text
0.006 per million

Sources

Frequency data
BCC Corpus (BLCU)