- 花柳病 huāliǔbìng sexually transmitted diseasesexually transmitted disease; venereal disease; often used in a historical or colloquial context. In the past, [[花柳|花柳|hua1 liu3]] was a metaphor for prostitutes, hence the name for diseases spread through sexual contact.
- 烟花柳巷 yānhuāliǔxiàng red-light districtred-light district; a neighborhood characterized by brothels and prostitution