Four papers from our group were accepted at NeurIPS 2026. Congratulations to all the authors! Manifold Drift in Flow Preference Optimization: A Root Cause of Reward Hacking Representation Preconditioning for Efficient Diffusion Model Training Optimizing Decoding Paths in Masked Diffusion Models by Quantifying Uncertainty Duality Models: An Embarrassingly Simple One-step Generation Paradigm