https://chrisyany.com/posts/Recent content in Writing on Yan YanHugoen-US© 2026 Yan YanTue, 25 Aug 2026 00:00:00 +0000https://chrisyany.com/posts/creator-flywheel/Tue, 25 Aug 2026 00:00:00 +0000https://chrisyany.com/posts/creator-flywheel/Turning viewers into creators, then growing creators into top creators: one flywheel, two engines, and three levers for thinking about where modeling fits in the creation problem on a short-video platform.https://chrisyany.com/posts/opro-and-gr2/Fri, 10 Jul 2026 00:00:00 +0000https://chrisyany.com/posts/opro-and-gr2/A close reading of OPRO, which uses meta-prompts to let LLMs iteratively optimize prompts, and GR2, which builds a recommendation re-ranker via semantic-ID mid-training, reasoning data generation, and DAPO RL.https://chrisyany.com/posts/may-2026-paper-notes/Fri, 05 Jun 2026 00:00:00 +0000https://chrisyany.com/posts/may-2026-paper-notes/Notes on five papers: CrossDistil’s cross-task distillation, DMT’s topology-aware training, an enhanced twin-tower retriever, Pinterest’s DHEN for CVR prediction, and Xiaohongshu’s UniNote multimodal embedding.https://chrisyany.com/posts/diffusion-models-for-recsys/Fri, 27 Feb 2026 00:00:00 +0000https://chrisyany.com/posts/diffusion-models-for-recsys/A close reading of DiffuRec, Flow Matching, and the learning dynamics of LLM finetuning, plus a survey of research directions, key papers, and open bottlenecks for diffusion in recommendation.https://chrisyany.com/posts/llm-recsys-landscape/Thu, 26 Feb 2026 00:00:00 +0000https://chrisyany.com/posts/llm-recsys-landscape/A categorized reading report on 41 papers at the intersection of recommender systems and LLMs, spanning Semantic ID generative retrieval, two-tower cold start, ranking scaling, and diffusion models.