白衣 + Noun
The noun 白衣 (báiyī) means "white clothes" or "white-robed" and is a literary or formal way to describe someone dressed in white. It is often used as a modifier before another noun, such as 白衣女人 (woman in white). It carries a slightly poetic or classical tone.
那个白衣女子从人群中走过,格外显眼。
Nàge báiyī nǚzǐ cóng rénqún zhōng zǒuguò, géwài xiǎnyǎn.
That woman in white walked through the crowd and stood out remarkably.
一位白衣少年站在桥上弹吉他。
Yī wèi báiyī shàonián zhàn zài qiáo shàng tán jítā.
A young man in white stood on the bridge playing guitar.
远处走来一个白衣老人,步伐很稳。
Yuǎnchù zǒulái yī gè báiyī lǎorén, bùfá hěn wěn.
An old man in white walked over from the distance with steady steps.