Xiaohongshu has introduced RedOne, its groundbreaking first social big model specifically designed for social networking services. RedOne is engineered to significantly enhance multi-task processing capabilities. In comparison to the baseline model, RedOne delivers an impressive average performance improvement of 14.02% across various SNS tasks and a notable 7.56% boost in bilingual evaluations. Online testing has confirmed that this model not only effectively curtails the exposure of harmful content but also concurrently elevates search click-through rates.