This paper explores the evolution of the SIS001 discussion board, one of the oldest Chinese-language online adult communities. It examines how the platform has maintained a "free" and accessible status through technical adaptation and decentralized mirror sites, serving as a case study for digital persistence within highly regulated internet environments. 2. Introduction
Workshops, seminars, and webinars hosted by electronics companies or educational institutions sometimes provide free samples of their products, including the SIS001 board.
SIS001 remains a testament to the endurance of traditional web forums, proving that community-driven spaces can outlast the rise and fall of corporate social media giants.