我姓孟也梦不到你我姓李也离不开你
[wŏ xìng mèng yĕ mèng bù dào nĭ wŏ xìng lĭ yĕ lí bù kāi nĭ]
Means 'I cannot dream of you no matter whether my surname is Meng or Li', which implies deep yearning or unreciprocated love for someone out of reach. The use of surnames symbolizes change and the futility of attempts.