4 sentences

1. 他的口角流露出一丝笑意。

   tā de kǒu​jiǎo liú​lù chū yī sī xiào​yì.

   A faint smile played at the corners of his mouth.

   Source: Dong Chinese Dictionary

2. 她眼角带着笑意。

   tā yǎn​jiǎo dài zhe xiào​yì.

   There was a hint of a smile in the corners of her eyes.

   Source: Dong Chinese Dictionary

3. 她的脸上浮现出一丝笑意。

   tā de liǎn shàng fú​xiàn chū yī sī xiào​yì.

   A faint smile appeared on her face.

   Source: Dong Chinese Dictionary

4. 她的眼里闪烁着淡淡的笑意。

   tā de yǎn lǐ shǎn​shuò zhe dàn​dàn de xiào​yì.

   A faint hint of a smile flickered in her eyes.

   Source: Dong Chinese Dictionary