RedOne: Revealing Domain-specific LLM Post-Training in Social Networking Services. - Fei Zhao; Chonggang Lu; Yue Wang; Zheyong Xie; Ziyan Liu; Haofu Qian; JianZhao Huang; Fangcheng Shi; Zijie Meng; Hongcheng Guo; Mingqian He; Xinze Lyu; et al. (CoRR, 2025)