Reactions to an interview with Tulong (Yang Ying) — Tsinghua biology, a Pittsburgh PhD decoding the brain for the US military, who came home and built four companies in a world of "accountants driving Ferraris and influencers showing up with gangster bosses." The title asks why she makes money at everything; she's the one who admits the jewelry line sold zero. What's actually valuable isn't a Midas touch — it's an operating system she can carry from neuroscience into skincare, books, and courses.

一份 AI 伴侣的成本拆解。Gemini Flash + 上下文缓存 + 豆包 TTS 实现了健康的毛利。但实时语音会改变一切。

A cost breakdown of running an AI companion at scale. Gemini Flash + context caching + 豆包 TTS delivers healthy margins on a single-tier subscription. But realtime voice changes everything.