HY-Motion 1.0 is a large language model developed by Tencent, focusing on generating high-quality 3D character actions. It has excellent action generation capabilities and the ability to understand text instructions. The model combines a flow matching mechanism with a three-stage training system, and through the introduction of human feedback reinforcement learning, it significantly improves the physical plausibility of actions. Its open-source initiative aims to promote the development of text-to-action technology and lower the barriers to high-quality animation production.