Subject + 微笑
The verb 微笑 (wēixiào) means "to smile" and describes a gentle, subtle smile. Unlike 笑 which can mean "to laugh," 微笑 specifically refers to a quiet, soft smile. For example, 她正看着他微笑 means "she was looking at him and smiling."
她看着照片,轻轻地微笑了一下。
Tā kàn zhe zhàopiàn, qīngqīng de wēixiào le yīxià.
She looked at the photo and smiled gently.
服务员总是面带微笑地迎接客人。
Fúwùyuán zǒng shì miàn dài wēixiào de yíngjiē kèrén.
The waiters always greet guests with a smile.