https://aifaultline.com/authors/tianshu-sun/New papers by Tianshu Sun in the AI Fault Line guide, and news naming them. https://aifaultline.com/research/p/title-e0716c83fbc005b6/https://aifaultline.com/research/p/title-e0716c83fbc005b6/Sun, 14 Jun 2026 00:00:00 +0000Wang, Kunievsky, Lou, Sun, and Evans document that after U.S. export controls on advanced chips, China pivoted open-source AI into national strategy and Chinese developers increased engagement with open LLM repositories substantially more than U.S. developers, with Chinese-origin open models then diffusing widely through research communities — including into U.S. open-access commercial research, even while absent from U.S. patent disclosures. The finding matters for the AI-policy debate because it suggests technological containment can backfire, accelerating a rival's open innovation ecosystem and leaving its contribution to U.S. commercial activity systematically undermeasured.