Echo-N1: Affective RL Frontier. - Naifan Zhang; Ruihan Sun; Ruixi Su; Shiqi Ma; Shiya Zhang; Xianna Weng; Xiaofan Zhang; Yuhan Zhan; Yuyang Xu; Zhaohan Chen; Zhengyuan Pan; Ziyi Song (CoRR, 2025)

EMPA: Evaluating Persona-Aligned Empathy as a Process. - Shiya Zhang; Yuhan Zhan; Ruixi Su; Ruihan Sun; Ziyi Song; Zhaohan Chen; Xiaofan Zhang (CoRR, 2026)