顾源说眼泪是忠诚顾里说眼泪是盐水
[gù yuán shuō yăn lèi shì zhōng chéng gù lĭ shuō yăn lèi shì yán shuĭ]
This refers to two remarks by fictional characters named Gu Yuan and Gu Li respectively from Chinese novelist Shu Tingyi's book 'Tiny Times'. Gu Yuan believes tears symbolize fidelity or intense feelings, while Gu Li views tears as mere saltwater, implying a more cynical view about showing emotions.