máo

毛

bǐ

笔（筆）

He wrote a regular script work with a Chinese ink brush.

This ink wash landscape painting was created with a weasel hair writing brush.

Grandpa often practiced calligraphy with a writing brush when he was young.

Beginners can start with a goat hair writing brush to learn the basics.

Among the four treasures of the study, the writing brush is an indispensable tool.