tā / xià / bǐ / hěn / kuài / bǐ / fēng / yì / zhuǎn / jiù / xiě / chū / le / piào / liang / de / héng / huà

他下笔很快，笔锋一转就写出了漂亮的横画。

He wrote quickly, turning the brush tip to create a beautiful horizontal stroke.