南柯一梦已天亮
[nán kē yī mèng yĭ tiān liàng]
'A dream at Nanke but it's already morning' alludes to the Chinese idiom 'South柯 Dream (南柯一梦)' where one dreams of prosperity only to wake up to find everything was illusory. This reflects on the fleeting nature of dreams and aspirations compared to the reality.