一颗心只装得下一个你只有你才走得进我心里
[yī kē xīn zhĭ zhuāng dé xià yī gè nĭ zhĭ yŏu nĭ cái zŏu dé jìn wŏ xīn lĭ]
'My heart is reserved only for you, only you can enter my heart.' It describes profound love and loyalty, signifying a deep connection that admits no one else besides the chosen person.