见他额间朱砂一笔
[jiàn tā é jiān zhū shā yī bĭ]
Translating directly, it means seeing 'the cinnabar stroke between his brows,' referring to marking oneself with a red mineral. In Chinese tradition, monks used vermillion to inscribe blessings or vows. Here it expresses admiration or longing for a unique sign of a beloved individual.