深爱之人在梦中
[shēn ài zhī rén zài mèng zhōng]
This means 'deeply loved person in dreams' ('深爱之人' represents deep love towards someone, and '在梦中' means in a dream/dreams). It expresses that the most adored figure only appears or exists within dreams, hinting at longing, nostalgia, or unattainable desire.