From The Book of Songs Zheng Feng Qian Shang, it tells the story of an angry girl.
If you miss me, cross the Qinhe River to find me. If you don't miss me, don't think that no one will miss me!
Dress: in ancient times, it refers to underwear, which is extended to culottes here.
Crazy boy: There are many explanations, one refers to arrogant men and the other refers to teenagers.
Zheng Feng has always been called an obscene poem by later generations. For example, Wang Anshi advised his younger brother Wang Anguo to "vote for Zheng Sheng" just to ask him not to just have fun. There are many examples in Zuo Zhuan, so I won't list them here!