A few of my theories and info I gathered:
1. YWS could be a Raven rather than a spy or assassin. (Small possibility I'm holding on to.)
2. GZY is the son of someone from the back hill. (Prince Xue, according to some watchers)
3. 风花雪月 (fēng huā xuě yuè) (back hill houses) - wind, flower, snow and moon, trite poetry subject (idiom); an effete language without substance; love affair; romance is in the air; dissipated life (I'm no expert in Chinese but this is what I got on google)
- I remember someone mentioning that the Feng household must have been expelled or removed from the clan and that they could be the ones who established WuFeng.
4. According to online resources, "The musical classic “Le Ji” 樂記 mentioned, “Gong is for the sovereign ruler, Shang is for the officials, Jue is for the people, Zhi is for national affairs and Yu is for public properties."
- Five Phases Music Therapy (FPMT) employs the theory of five phases and five music scales or tones (宫Gong (do), 商Shang (ri), 角Jue (mi), 徵Zhi (so) and 羽Yu (la)) to analyze and treat mind-body illness.
5. 魑魅魍魉 (魑魅魍魉) - demons and monsters (idiom)
- chi - mountain demon
- mei - forest demon (someone who can charm)
- wang - elf
- liang - fairy