梦为远别啼难唤书被催成墨末浓
[mèng wéi yuăn bié tí nán huàn shū bèi cuī chéng mò mò nóng]
Derived from classical Chinese literature, it depicts the feeling when dreams about farewells are hard to call back, like ink diluted but then turns into thick darkness, expressing poignant emotions of longing and separation.