Yunyinggu Technology

Yunyinggu Technology (无限谷) is a portfolio company of Vertex Ventures with investment participation by Zhou Zhifeng , positioned in the AI companionship space with a reported $70 million valuation and backing from ZhenFund and IDG . The company was founded by Cai Mao, who drew on his dual experience building the app 猫耳 and running a game studio at Bilibili to pursue what he saw as a gap between app developers and high-quality 3D content creators .

Yunyinggu's product centers on "Lu," an AI-driven virtual companion that combines public IP with personal customization—users share the same character archetype but each owns a uniquely numbered instance with private memories . The company targets women aged 15 to 50 and monetizes through content and IP logic rather than the "edgy" paywall tactics common in the sector, with ambitions to evolve from PGC toward a PUGC platform model . Cai distinguishes Yunyinggu from visual novels like *Love and Deepspace* by pursuing both high content quality and high user freedom, enabled by AI rather than static narrative .